The most famous shipwreck in history is probably the Titanic, which lies on the seafloor in the North Atlantic Ocean. But shipwrecks are as old as sea voyages, and sunken ships have been found at the seafloor all over the world, from ancient Greek vessels in the Mediterranean to Civil War battle ships off the U.S. East Coast. Divers looks for shipwrecks to salvage valuable artifacts and to learn more about past cultures. Read about the latest shipwreck discoveries and see pictures of sunken ships below.