This tunnel is a hatred object for all who have to pass it, because of darkness, coldness and wetness,  even if the majority don’t realize that the tunnel was used as a camp for 150 prisoners of world war II in former times. This tunnel makes goose bumps. The tunnel has been re-painted 2016 by Pascal Maßbaum, a local freelance graffiti artist. Passing it, you’ll swim through the tunnel with several inhabitants of a tropical reef like turtles, sharks, dolphins and fish.