

The underwater wreck of the ship 'Sulina,' is seen submerged below the Black sea in Ukraine. Scuba divers with underwater flashlights explore the depths.
A diver checks out the cannon on a sunken Japanese World War II ship, one of 40 ships sunk in a massive US air attack in 1944. Known as the 'ghost fleet,' the site has become the one of the most popular diving locales.
A white marble sculpture of the god Serapis from Egypto-Greek mythology of the Ptolemaic period was found in the undersea remains of the ancient Egyptian city of Herakleion off the coastal town of Abu Qir, near Alexandria, is displayed in a five-star hotel in Alexandria. A team of divers led by French underwater explorer Frank Goddio discovered treasures that date back to the Pharaohs, Greeks, Romans, and early Muslims during two years of exploration and excavation.
The famous submersible robot, Alvin, is seen here. Alvin discovered the wreck of the Titanic and hydrothermal vents of boiling water on the bottom of the Atlantic with their new forms of life.
Divers look at the wreckage of the Sankisan Maru, a Japanese ship sunk in World War II in Truk Lagoon in the central Pacific.
A still of the wreckage of the famous ocean-liner The RMS Titanic from director James Cameron's film 'Ghosts of the Abyss' is seen here. Cameron made the film with underwater lights and remote-controlled robots carrying cameras.
Another view of the 'Sulina,' submerged on the Black sea in Ukraine, is seen. A diver with an underwater light examines a crest on the ship.
The wreck of the British Merchant Navy ship, SS Thistlegorm, sunk in 1941, is seen beneath the Red Sea. The ship is now a well-know dive site.
This undated photo, released by National Geographic and taken on the Mediterranean Sea floor, shows several amphoras, which might have carried wine, oil or fish sauce, some 2,000 years since they went down with a trading ship. The ship is one of the earliest found from ancient Roman times. An archaeologist on the project, John Oleson, said sampling the amphoras was like '...shopping in a Roman kitchenware outlet.'
During the excavation of the SS Republic, sunk in 1865 off the coast of Savannah Georgia, Odyssey Marine Exploration, Inc. discovered this collection of delicate porcelain angels. They survived a hurricane, a shipwreck, and endured for over a century 1,700 feet beneath the Atlantic Ocean.
An World War II-era anchor sits on the ocean floor at Juno Beach, off the coast of Normandy, France.
Jason the Robot searches the ocean depths in search of sunken treasure in this undated photograph. Robots, dispatched to depths where scuba divers dare not go, can produce images of shipwrecks and snare treasures as heavy as anchors or as delicate as glassware.