Ravnik/island of Vis
On the southern side of the island of Ravnik, there is a cave called Medvjeđa Špilja (or Zelena Špilja). The ceiling is high enough for a small speedboat, but definitely not a sailing yacht with mast.
The entrance and exit are clearly visible from the outside, and are next to each other. A hole in the ceiling causes an unusual play of light in the sea. Swimming in the cave is safe and entrance is free of charge. Be careful while circling in front of the cave, as often there are scuba divers, who should use their surface marker buoys.
Text by Tomislav Šakić