Psathoura is the northernmost of the desert islands, with an area of only 2 square kilometers. The Psathoura Lighthouse stands out from a distance, 25 meters high, which emits a constant light 18 nautical miles. Psathoura is a volcano that was active in ancient times. In the last century, divers had reported that at a shallow depth there were ruins of a city, while based on the book "ABOVE MAGNETIC ISLANDS", by K. Mavrikis, Psathoura might be the ancient Chrysi.
