The wreck tunnel is an underwater tunnel that runs from the museum's first plane down to the bottom of the Baltic Sea. From the windows of the tunnel you can see a real shipwreck!
Through the windows you see the remains of a 17th-century ship. Most likely, the wreck that rests under the museum is the warship Prince Carl from 1684. In the 1600s, she sailed with a crew of about 600 men, with 68 guns on board. The warship Prince Carl was over 50 meters long.