For many years the island of Vis was a military base of the Yugoslav army, making it forbidden for all foreign visitors, especially tourists, until 1990. During the Second World War, Vis was the partisan base for coordinating military operations. It was also a military airbase of the Allied forces, the remains of which are still visible throughout the island.
Abandoned warehouses, nuclear bunkers, a former missile base, and bomb-proof submarine shelters are just some of the impressive abandoned military facilities scattered around the island. The most mysterious is probably kilometers of underground tunnels made to protect Tito in the case of the Cold war attack. If you like an active vacation and you are a history buff, a military tour is something that might fit your size just right.