We cruise towards 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.