Day 6: Tilos – Tilos Tilos is surrounded by high and rocky mountains, steep coasts, beaches with transparent waters and caves. It has Medieval castles built or rebuilt by the Knights of St John, a Byzantine monastery, many small graphical churches and an in 1970 deserted village Mikro Chorio that is now declared a cultural monument. You may visit the Charkadio Cave full of paleontological discoveries like the famous dwarf elephant fossil bones. This is the place where the last elephants of Europe lived: the dwarf elephants appeared in the island 45,000 years ago and disappeared 4,000 years ago.