For 15 years a team of Finnish explorers having been hunting for a U-boat in the Baltic Sea. In their quest they found not one, but three submarines — two Nazi U-boats and one Soviet Sub. These virgin wrecks are impaled into the seabed floor and inside each sub remain the bodies of 50 men. The location of these 3 submarines has not been made public. KPI and Nat Geo have gotten exclusive access to this story that we will bring to the public in a one-hour special in January.