Tunnel is situated on the north side of Prvic Island. At the most northern tip of the island of Prvic is a rock in the water through which leads a tunnel roughly 35m long. After the descent, you arrive at the entrance of the tunnel at a depth of around 12 metres. With a diameter of around 3 metres, the tunnel is very easy to dive through. You barely reach the other side when one of the most beautiful rock faces in the whole area immediately begins. Anyone who still has enough air in the tank after the dive through the tunnel and the rock face, should not miss the Pillar-Cave, which is located only about 40 meters away, opposite the rock.