Krušice Millitary Submarine Tunel
During communism in Croatia, Yugoslavian army bulit tunnels in the island connected with a sea. It was intended for safe harboring special forces submarines and smaller navy vessels! Tunnels have also preserved mechanism for hiding the entrance in case of attack or aerial scouting. Today tunnels along coast are used for safe harboring fishermans during sudden storms, and are visited by many tourists and military enthusiasts.