Plic Porer Cave is a popular diving site located on the island of Ugljan in Croatia. The cave is a large underwater cavern system with a number of chambers and tunnels to explore. The entrance to the cave is a large opening at the surface of the water, and the cave descends to a depth of about 130 feet. The cave is home to a variety of marine life, including fish, shrimp, and crabs. The water in the cave is clear and visibility is good, making it a great place for diving and snorkeling.