Unška Koliševka, unlike other sinkholes found, for example, in the Rakov Škocjan karst reserve, hides another peculiarity. In fact, around the sinkhole there are military tunnels and bunkers carved into the rock, which were built by Italian soldiers between the two world wars. A smaller part of these corridors with a total length of about 1.5 km is still freely accessible.
Please remember the paths you take, not that someone stays inside 😜. There are several junctions. Some useful information has been written on the walls.
Watch out, at an exit (viewpoint) it goes down vertically. A skull was previously painted on the right wall.
We could not commit a course because the water was too high. Otherwise it is a very interesting and exciting experience. We can only recommend it!! Be sure to bring flashlights!!