Horrorsubmarine of inventer and psycho killer Peter Madsen. UC3 Nautilus 2.0 in Copenhagen Harbor
UC3 Nautilus was a privately built Danish midget submarine. It was built over a three-year period as an art project by Peter Madsen and a group of volunteers, and cost approximately US$200,000 to build. The submarine was Madsen's third submarine design, and at the time of launch on 3 May 2008, was the largest privately built submarine in the world.