The famous Cave of Apocalypse is found south of the Skala village, between the harbor and Chora. This is where Saint John wrote the Book of Revelation and where thousands of tourists come every year, as this is the most important religious site in Greece. Inside the cave there are worth-while byzantine wall-paintings and on the ceiling wall there is the triple crack, symbol of the Holy Triad, from where it is said that the voice of God dictated the Book of Revelation to Saint John.