The Cave of the Apocalypse is situated about halfway up the mountain on the Aegean island of Patmos, along the road between the villages of Chora and Skala. This grotto is believed to mark the spot where John of Patmos received his visions that he recorded in the Book of the Apocalypse (Revelation). In 1999, UNESCO declared the cave a joint World Heritage Site together with the Monastery of Saint John the Theologian.
Exiled to Patmos by the Roman Emperor Domitian in A.D. 95, St. John the Divine is said to have made his home in this cave, though Patmians insist quite reasonably that he walked every inch of the small island, talking with its people. The cave is said to be the epicenter of his earth-shaking revelation, which he dictated to his disciple and which has come down as the Book of the Apocalypse, or Revelation, the last book of the Christian Bible. The cave is now encased within a sanctuary, which is in turn encircled by a convent. A stirring brochure written by Archimandrite Koutsanellos, Superior of the Cave, provides an excellent description of the religious significance of each niche in the rocks, as well as the many icons in the cave. Other guides are also available in local tourist shops. The best preparation, of course, is to bone up on the Book of Revelation