This is the largest cave in Cyclades and one of the largest in Greece. Its entrance is so small that the locals say: if you do not get down on your knees, you get to see no cave. It would be wise to ask a local tourist guide to bring you here. The interior of the cave will impress you with the artistic stalactite formations, the beautiful colors and the cave size. On the 28th of August the Holy Service is held in the first room of the cave, which is bright with the lights of thousands candles in every corner, under a unique atmosphere of mystic. It will take you 45 minutes to reach the cave from Panagia village.