Luigi Costantini  /  AP
In this photo taken on Jan. 27, 2012 a cruise liner sails past the Giudecca canal in Venice, Italy. The fatal grounding of the Costa Concordia off the Tuscan coast has sharpened the focus on the largely unchecked boom of these ever-larger luxury liners, and nowhere more so than in Venice, a fragile city already struggling against mass tourism and the steady deterioration of its underwater foundations.
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updated 2/5/2012 12:59:26 PM ET 2012-02-05T17:59:26

It's a matter of perspective. From aboard a 12-deck cruise liner, the sight of St. Mark's Square, the Doge's Palace and Bridge of Sighs gliding past from a cabin balcony is a breathtaking thrill.

But against the backdrop of Venice's storied canals and Byzantine architecture, these floating condominiums present a jarring sight, out of scale and sync with the surroundings.

The fatal grounding of the Costa Concordia off the Tuscan coast has sharpened the focus on the largely unchecked boom of these ever-larger luxury liners, and nowhere more so than in Venice, a fragile city already struggling against mass tourism and the steady deterioration of its underwater foundations.

Slideshow: Luxury cruise ship runs aground (on this page)
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There's growing clamor for an urgent rethink to the expanding cruise liner traffic through Venice's historic center. Critics point not only to a threat of accidents, but also air and water pollution, and the injection of an additional 2 million more tourists a year into a city already under constant siege.

The city wants to reroute cruise ships arriving in Venice so they stay farther from St. Mark's and other prominent monuments as a possible step toward keeping them out of the lagoon altogether. And UNESCO, the U.N. culture organization, charges that the liners cause water tides that erode building foundations and pollute waterways.

Video: Italy calls off Costa Concordia search (on this page)

Venice in the space of 15 years has become one of the world's most important cruise destinations, the port serving as a lucrative turnaround point for 650 cruises a year — up to nine a day in high season. Since 1997, the number of passengers cruising through Venice has risen from 280,000 to 1.8 million last year.

"One third of all cruise ships worldwide come to Venice each year," said Roberto Perocchio, managing director of the Venice passenger terminal, which manages cruise traffic in the lagoon.

He expects the appetite for cruising to continue to grow, citing forecasts that the 5 million annual cruise passengers a year in Europe is expected to double by 2020.

If the cruise ships were modern buildings, which they strongly resemble, they would certainly not be allowed in Venice, a UNESCO heritage site that mandates the view of protected places cannot be permanently altered. But because they move, there is no official sanction against them.

Story: From shipwreck in Italy, a treasure now beckons

Just a day after the grounding of the Costa Concordia, dozens of protesters demonstrated as an MSC cruise liner sailed across the St. Mark's basin. Grassroots opposition to the luxury liners predates the Costa disaster, but it has taken new impetus.

"Venice is too often on its knees in front of the gods of economy and tourism, and we have been paying the consequences for years. The city has been emptied of its residents, and it's a victim of pollution from this unsustainable traffic," said Saverio Pastor, a craftsman who makes oarlocks for gondolas, who has been leading the campaign to rid the Venice basin of cruise ships.

Studies commissioned by the Port Authority show that the cruise liners are responsible for up to 30 percent of the city's air pollution.

Residents along the Giudecca canal, the wide waterway through which the ships pass en route to their berths, complain both about the noise and the impact of water being pushed up into the narrower feeder canals, eroding foundations as the water surges and recedes.

"One woman told me that when the ships pass, water from the canals backs up into her toilet," said Jane da Mosto, a longtime Venice resident and scientist for the London-based Venice in Peril association.

The preservation of Venice is an age-old dilemma. In the 15th century, Venetians decided to reroute the rivers emptying into the lagoon to maintain Venice's seafaring course and prevent the waterways from silting up.

Slideshow: Italian dreams (on this page)

"Today, we have the opposite problem," da Mosto said. "The lagoon is being drastically eroded, thanks to the navigation channels that suck sediment out in the wake of the ships. There is now less than one-third of the original salt marsh."

The ships pass within 300 meters (1,000 feet) of St. Mark's Square, but officials for the Venice Port Authority say there is little risk of an accident like the Concordia. For one thing, there are no rocky outposts in the lagoon's muddy bottom. More significantly, they point out that size of the cruise ships requires them to move along deep trenches dredged in the canal bed, leaving little room for disaster.

Story: So, just how safe is your ship?

They cite an incident in 2004, when the 655-foot cruise ship Mona Lisa ran aground near St. Mark's Square in Venice in thick fog. None of the 1,000 passengers and crew on the Mona Lisa was hurt, and port officials say the accident is an example of how Venice can ward off danger.

"It may look like the lagoon is open, and that the cruise ship can go where it wants. But in fact, Venice protects itself," said Ciro Romano, head of the team of 25 captains assigned to board cruise ships outside the lagoon and oversee their passage through Venice, accompanied by a pair of tug boats.

Opponents of the large ships point to another incident in the 1980s, when a container ship went aground on the sidewalk near the park that hosts the Biennale contemporary art show every two years.

Costa Concordia removal could take up to a year

To deal with the air pollution, the port is studying a system that would permit the ships to plug into a power grid when docked, allowing them to turn off their engines. But Pastor said the system has long been under study and will require huge investments.

Port officials also say that there is no question of informal salutes like the one that drew the nearly 300-meter Costa Concordia close to Giglio island. But critics charge that every time a boat passes St. Mark's it is in effect, a salute, even if the horns don't sound.

Even before the Concordia disaster, Venice Mayor Giorgio Orsoni and the chief port official signed an agreement for new studies on alternative routes — but passenger terminal officials believe that passing by St. Mark's is a key attraction.

Francesco Bandarin, UNESCO's assistant director-general for culture — and a Venetian himself — said longer-term solutions are needed.

"The city is a very fragile city. This is a city that comes to us from the Middle Ages," Bandarin said. "It is not designed for having that kind of traffic. It is designed to have ships, and we will always have ships around Venice, but not these kind of ships."

Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

Photos: Luxury cruise ship Costa Concordia runs aground

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  1. The body of a victim, retrieved from the Costa Concordia cruise ship which ran aground off the west coast of Italy, is lifted to a helicopter during operations to bring up four bodies from the wreck at Giglio island on Feb. 23. Divers found a total of eight bodies on the wreck on Feb. 22. (Giampiero Sposito / Reuters) Back to slideshow navigation
  2. Firefighters search inside the Costa Concordia cruise ship in this picture released on Feb. 23. Italian prosecutors placed four of the ship's officers and three company executives under investigation on Wednesday in connection with the disaster as divers found eight more bodies on the wreck, including that of a 5-year-old girl. (Reuters) Back to slideshow navigation
  3. View of the worksheet for the recovery of bodies inside the Costa Concordia cruise ship. (Enzo Russo / EPA) Back to slideshow navigation
  4. A diver from the Rotterdam-based SMIT salvage firm works underwater while taking part in the operation to remove fuel from the cruise ship Costa Concordia, as it lies stricken off the shore of the island of Giglio on Feb. 16. (Laura Lezza / Getty Images Contributor) Back to slideshow navigation
  5. The capsized Costa Concordia cruise ship is seen off the west coast of Italy at the snow-covered Giglio island on Feb. 11. Salvage and rescue operations on the capsized ship faced a new obstacle on Friday as rare snowfall hit Giglio, stopping ferry services out of Porto Santo Stefano to the island. (Giampiero Sposito / Reuters) Back to slideshow navigation
  6. A firefighter is helped as he leaves the side of the Costa Concordia cruise ship. Bad weather had delayed plans to begin removing the 2,300 tons of diesel fuel in the ship's tanks. (Max Rossi / Reuters) Back to slideshow navigation
  7. Hungarians carry the coffin of Sandor Feher, a violinist who died during the accident after he had rescued children and other passengers on the Costa Concordia. The funeral ceremony was held in Budapest on Feb. 1, in the KIspest cemetery. (Ferenc Isza / AFP - Getty Images) Back to slideshow navigation
  8. A scuba diver inspects the Costa Concordia cruise ship in this still image taken from video shot by Italian firefighters on Feb. 1. (Handout / Reuters) Back to slideshow navigation
  9. Firefighters are lowered from a helicopter onto the grounded Costa Concordia on Jan. 30. Search operations in the submerged Costa Concordia were permanently ended after officials said it had become too dangerous for divers. (Vigili del Fuoco via Reuters) Back to slideshow navigation
  10. A scuba diver inspects the inside of the Costa Concordia on Jan. 30. (Vigili del Fuoco via Reuters) Back to slideshow navigation
  11. Seagulls fly in front of the grounded cruise ship on Jan. 30. Residents of Giglio are growing increasingly worried about threats to the environment and the future of the Italian island as the recovery operation is forecast to take up to a year. (Pier Paolo Cito / AP) Back to slideshow navigation
  12. Technicians of SMIT, the Dutch extraction company, work in the port of Giglio on Jan. 28. Rough seas forced a delay in the planned start of the operation to remove a half-million gallons of fuel from the grounded Costa Concordia. (Pier Paolo Cito / AP) Back to slideshow navigation
  13. A scuba diver seen during preparations for the oil extraction operation on Jan. 28. (SMIT Salvage via AP) Back to slideshow navigation
  14. Oil recovery workers climb on board the Costa Concordia cruise ship Jan. 24. Salvage crews began preparations to pump fuel from the wreck as the search continued for more bodies 11 days after the cruise liner struck a rock off the Tuscan coast and capsized. (Tony Gentile / Reuters) Back to slideshow navigation
  15. A detailed drawing of the Costa Concordia is displayed Jan. 23 as salvage workers prepare to recover fuel from the stricken cruise ship. (Laura Lezza / Getty Images Contributor) Back to slideshow navigation
  16. A firefighter is lowered from a helicopter above the Costa Concordia in an undated photo made available on Jan. 23. (Vigili del Fuoco via AP) Back to slideshow navigation
  17. Two Italian navy scuba divers inspect inside the Costa Concordia as it lies on its side, half-submerged and threatening to slide into deeper waters, in this photo released on Jan. 23. (Marina Militare via Reuters) Back to slideshow navigation
  18. Workers of Italian cruise line Costa Crociere march in downtown Genoa, Italy, on Jan. 22. (Luca Bruno / AP) Back to slideshow navigation
  19. A firefighter climbs on the bridge of the Costa Concordia on Jan. 22. A week after the 114,500-ton ship ran aground and capsized off the Tuscan coast, hopes of finding anyone alive have all but disappeared. (Paul Hanna / Reuters) Back to slideshow navigation
  20. Family members of missing victims throw flowers into the water near the wrecked Costa Concordia cruise ship, on Jan. 21. (Giampiero Sposito / Reuters) Back to slideshow navigation
  21. Divers recover a statue of the Madonna from inside the chapel of the Costa Concordia cruise ship. (Massimo Percossi / EPA) Back to slideshow navigation
  22. An Italian Fire Department helicopter hovers over the wrecked Costa Concordia cruise ship off the island of Giglio, Jan. 20. The ship struck rocks on Jan. 13. (Massimo Percossi / EPA) Back to slideshow navigation
  23. Carabinieri police divers passing by the bell of the stricken Costa Concordia luxury liner during their underwater search on Jan. 19. Rescuers were forced to suspend operations after the ship moved again on Friday, firefighters' spokeman Luca Cari said. (Carabinieri via AFP - Getty Images) Back to slideshow navigation
  24. Firefighters work from the side of the Costa Concordia on Jan. 19. (Vigili del Fuoco via Reuters) Back to slideshow navigation
  25. Relatives and friends of victims of the stricken cruise ship are escorted by police to a local church on the island of Giglio on Jan. 19. (Massimo Percossi / EPA) Back to slideshow navigation
  26. Scuba divers of the Gruppo Carabinieri Subaquei diving under the wreck of the Costa Concordia on Jan. 19. (Carabinieri via EPA) Back to slideshow navigation
  27. Search and rescue teams continue the search for survivors on the Costa Concordia on Jan. 19. (Tullio M. Puglia / Getty Images) Back to slideshow navigation
  28. Technician Andrea Faccioli operates a high-density scanner, an instrument that detects any movement of the Costa Concordia, on Jan. 19. Rescuers fear that worsening weather could cause the ship to slide off the reef it is resting on. (Vincenzo Pinto / AFP - Getty Images) Back to slideshow navigation
  29. Han Ki-Deok, left, and his wife Jeong Hye-Jin, honeymooners who were rescued from the Costa Concordia after a terrifying 30-hour ordeal, speak to reporters Jan. 19 as they arrive at the Incheon International Airport in Incheon, South Korea. (Jeon Heon-Kyun / EPA) Back to slideshow navigation
  30. Divers prepare to head out to the Costa Concordia on Jan. 19. (Gregorio Borgia / AP) Back to slideshow navigation
  31. The Costa Serena, background, passes its wrecked sister ship, the Costa Concordia, on Jan. 18. International cruise goers put on a brave face as Costa's first Mediterranean tour since last week's tragedy set sail out of the same port as the doomed luxury liner. (Vincenzo Pinto / AFP - Getty Images) Back to slideshow navigation
  32. Angel Paredes, right, a Peruvian crew member who survived the Costa Concordia cruise ship disaster, is welcomed by relatives at Lima's airport on Jan. 18. (Mariana Bazo / Reuters) Back to slideshow navigation
  33. Police divers surface in the water Jan. 18 close to the wrecked Costa Concordia. (Massimo Percossi / EPA) Back to slideshow navigation
  34. A firefighter hangs from a helicopter over the Costa Concordia on Jan. 18. Divers searching the capsized cruise liner suspended work on Wednesday after the vast wreck shifted slightly, but officials said they are hoping to resume as soon as possible. (Max Rossi / Reuters) Back to slideshow navigation
  35. Venedicta Molina, front, and her husband Saturnino Soria, left, parents of missing Peruvian crew member Erika Soria, arrive at Giglio island on Jan. 18. "We will not leave until we have found Erika," her father said. (Massimo Percossi / EPA) Back to slideshow navigation
  36. A bench from the stricken ship lies on nearby rocks on Jan. 18. (Massimo Percossi / EPA) Back to slideshow navigation
  37. A view taken from a ferry on Jan. 18 shows an officer standing as the stricken Costa Concordia is seen aground in front of the harbor of the Isola del Giglio. (Vincenzo Pinto / AFP - Getty Images) Back to slideshow navigation
  38. A satellite image shows the wreck of the Costa Concordia off the island of Giglio on Jan. 17. (DigitalGlobe) Back to slideshow navigation
  39. Francesco Schettino, the captain of the Costa Concordia, leaves a court in Grosseto on Jan. 17. Prosecutors have accused Schettino of manslaughter, causing a shipwreck and abandoning his ship before all passengers were evacuated. (Alessandro La Rocca / Lapresse via AP) Back to slideshow navigation
  40. Rescuers work on the cruise ship Costa Concordia as it lies stricken off the shore of the island of Giglio on Jan. 17. (Laura Lezza / Getty Images) Back to slideshow navigation
  41. Police scuba divers search the Costa Concordia on Jan. 17. (Italian Police via EPA) Back to slideshow navigation
  42. Italian naval divers recover a body Jan. 17 from the cruise ship Costa Concordia. Five more bodies have been found aboard the capsized cruise ship, raising the official death toll to 11. (Gregorio Borgia / AP) Back to slideshow navigation
  43. Rescuers place explosive charges on the side of the Costa Concordia on Jan. 17 to create access holes prior to entering the stricken ship. (Andreas Solaro / AFP - Getty Images) Back to slideshow navigation
  44. A side of the Costa Concordia cruise ship is seen underwater, Jan. 16. Rescue squads used controlled explosions on to enter a sticken Italian crusie liner in the increasingly despairing hunt for survivors. (Guardia Costiera via Reuters) Back to slideshow navigation
  45. The heavily listing Costa Concordia, as seen the night of Jan. 16 from the harbor on Giglio island. (Andreas Solaro / AFP - Getty Images) Back to slideshow navigation
  46. Rescuers search for missing people in and around the partially submerged Costa Concordia on Jan. 16. (Filippo Monteforte / AFP - Getty Images) Back to slideshow navigation
  47. Rocks at "Le Scole” reef, around 500 feet from Giglio island’s coast, are seen on Jan. 16 with the ship's wreck in the background. Residents of Giglio said they had never before seen the Costa Concordia come so close to the dangerous reef area. (Andreas Solaro / AFP - Getty Images) Back to slideshow navigation
  48. A woman looks at the wreck of the Costa Concordia cruise liner on Jan. 16. The owner of the luxury liner said its captain had made "errors of judgment" as the search continued for the missing. (Gregorio Borgia / AP) Back to slideshow navigation
  49. A diver jumps into the water near the Costa Concordia on Jan. 16, three days after it ran aground. (Gregorio Borgia / AP) Back to slideshow navigation
  50. A woman is hugged by a relative upon her arrival early Jan. 16 on the French Indian Ocean island of La Reunion with 30 other passengers who survived the Costa Concordia accident. (Richard Bouhet / AFP - Getty Images) Back to slideshow navigation
  51. Rescue workers climb aboard the Costa Concordia on Jan. 16. (Max Rossi / Reuters) Back to slideshow navigation
  52. A rescue boat and a helicopter patrol near the Costa Concordia on Jan. 16. (Andreas Solaro / AFP - Getty Images) Back to slideshow navigation
  53. A coast guard scuba diver makes his way through floating pieces of furniture Jan. 15 inside the Costa Concordia. (Italian Coast Guard via AP) Back to slideshow navigation
  54. Costa Concordia passenger Lauren Moore, right, of Bowling Green, Ky., is greeted upon her return from Italy by her father, Ronnie Moore, second right; mother, Sarah Moore; and sister, Leslie Moore, left, on Jan 15 at the Louisville International Airport. (Alex Slitz / Daily News via AP) Back to slideshow navigation
  55. Firefighters on a dinghy look at a rock emerging from the side of the Costa Concordia on Jan. 15. (Andrea Sinibaldi / Lapresse via AP) Back to slideshow navigation
  56. This underwater image shows the partially submerged ship on Jan. 15. (Guardia Di Finanza via EPA) Back to slideshow navigation
  57. Divers continue their search for survivors aboard the Costa Concordia as it lies stricken off the shore of the island of Giglio on Jan. 15. (John Cantlie / Getty Images Contributor) Back to slideshow navigation
  58. Rescue operations continue Jan. 15 on the Costa Concordia. The ship's captain, Francesco Schettino, was taken into custody over accusations that he abandoned ship before all the passengers had safely evacuated. (Maurizio Degl' Innocenti / EPA) Back to slideshow navigation
  59. Costa Concordia cruise liner captain Francesco Schettino, right, is escorted by police on Jan. 14 in Grosseto. Schettino was arrested on charges of manslaughter, causing a shipwreck and abandoning ship, police said. (Stringer/italy / Reuters) Back to slideshow navigation
  60. A helicopter evacuates Marrico Giempietroni, the Costa Concordia's injured cabin service director, on Jan. 15. He was located by rescuers more than 24 hours after the ship ran aground and has a broken leg. (Filippo Monteforte / AFP - Getty Images) Back to slideshow navigation
  61. Boats patrol near the Costa Concordia on Jan. 15. (Filippo Monteforte / AFP - Getty Images) Back to slideshow navigation
  62. Two passengers from South Korea who were on their honeymoon are rescued from the Costa Concordia on Jan. 15 after being found trapped on the ship. (Reuters, AP) Back to slideshow navigation
  63. The Costa Concordia cruise ship that ran aground is seen Jan. 14 off the coast of Giglio. At least 11 people were killed, and rescuers were searching for other victims after the Italian cruise ship carrying more than 4,000 people ran aground. (Italian Guardia di Finanza / Reuters) Back to slideshow navigation
  64. Passengers arrive at Porto Santo Stefano on Jan. 14 after the Costa Concordia ran aground. (Reuters) Back to slideshow navigation
  65. Italian coast guard personnel recover the "black box" of the luxury cruise ship Costa Concordia to establish the precise sequence of events behind the disaster, which occurred in calm seas and clear weather. (Gregorio Borgia / AP) Back to slideshow navigation
  66. The Costa Concordia is seen Jan. 14 off the west coast of Italy. Rescue workers continue to search for survivors. (Reuters) Back to slideshow navigation
  67. Some of the passengers of the shipwrecked cruise ship Costa Concordia receive first aid and comfort each other in Savona, Italy. (Luca Zennaro / EPA) Back to slideshow navigation
  68. Rescue workers help a woman Jan. 14 upon her arrival at Porto Santo Stefano in Italy. Helicopters and nearby boats assisted in the rescue efforts. (Reuters) Back to slideshow navigation
  69. Evacuated Costa Concordia passengers wear life vests and blankets as they arrive at shore. (Enzo Russo / EPA) Back to slideshow navigation
  70. Members of the emergency services take an injured passenger from the Costa Concordia to a waiting ambulance Jan. 14 on the island of Giglio. (Enzo Russo / EPA) Back to slideshow navigation
  71. A lifeboat from the Costa Concordia is towed to a port on the island of Giglio by a fishing boat after the luxury cruise liner ran aground late Friday night. (Peter Honvehlmann / Zuma Press) Back to slideshow navigation
  72. Costa Concordia passengers are seen Jan. 14 in a rescue boat. The ship had sailed from the Italian port of Civitavecchia just hours before the accident. (Peter Honvehlmann / EPA) Back to slideshow navigation
  73. Passengers line up on the side of the Costa Concordia and move down along the side of the vessel Jan. 14 during the evacuation in this still image taken from video. (Italian Coast Guard via Reuters) Back to slideshow navigation
  74. Passengers and crew members wearing life jackets prepare to evacuate the Costa Concordia on Jan. 13 after the ship ran aground. (Sky Italia via AFP - Getty Images) Back to slideshow navigation
  75. The Costa Concordia lays on its starboard side after it ran aground on Jan. 13, forcing some 4,200 people aboard to evacuate aboard lifeboats to the nearby Isola del Giglio. (Giuseppe Modesti / AP) Back to slideshow navigation
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  1. Image: Body of victim is lifted to a helicopter during operations to bring up four bodies from wreck at Giglio island
    Giampiero Sposito / Reuters
    Above: Slideshow (75) Luxury cruise ship runs aground
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Video: Italy calls off Costa Concordia search

  1. Closed captioning of: Italy calls off Costa Concordia search

    >>> in italy tonight, officials there say they have called off the search for missing people in the submerged portion of that costa concordia vessel because it's just become too dangerous for the divers on the job. they'll continue to search the portion above the water line and around the coastline. 16 people are still listed, remember, as officially m lly missing. that includes an american couple from minnesota. 15 people

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