Swedish treasure hunters have captured images of a mysterious wreck in the Baltic Sea . `` The professional shipwreck discoverers are doing a great effort for cultural heritage management in the long run ... It 's estimated around 100,000 objects , mostly shipwrecks , are littered throughout the region . Deep - sea salvage company Ocean ##ic uses thermal imaging to search for wrecks .
Swedish treasure hunters have captured images of a mysterious wreck in the Baltic Sea . It 's estimated around 100,000 objects , mostly shipwrecks , are littered throughout the region . Deep - sea salvage company Ocean ##ic uses thermal imaging to search for wrecks .