It is one of the most beautiful caves in Greece. The cave, also known as Cave of the Nymphs, is surrounded by forest and has a wonderful lake within. The cave is about 500m from the sea, the water level is a meter higher than sea level, and the sea water rises from a 30m deep cave system on one side of the cave and flows to the other side of the cave, flowing through narrow paths into the sea. Here the water from the Katavothres on the other side of the island reappears. The water is a mixture of non salty and sea water!The cavern has two big chambers. When the sun is overhead, its rays strike the ultramarine water, lighting the cave with blue light. So the best time to visit the cave is on a sunny day at the middle of the day. The boats seem to hover on a lake of blue light. A complete tour is best by boat.