Chrysospilia is a cave in the northeastern side of the island, about 30 meters above the sea, with great speleological and archaeological interest. It is 300 meters long, and has two main chambers which are connected by a small ramp. In the first chamber there used to be Roman reservoirs and numerous shells, while in the second chamber you can see impressive stalactites.
However, the element that makes Chrysospilia a unique monument of world cultural heritage is the number of ancient names covering the walls and ceiling of the cave. The names date mainly back to the 4th century B.C. and belong to teenagers who came here from all parts of Greece. Those who managed to enter the main chamber wrote their names and, thus, left traces of their visit. It is speculated that the reason of the visit was in order to take part in an adulthood ceremony. About 400 names of men (female names are rare) have been registered, many of which are accompanied by adjectives that indicate their place of origin. Also, human bones have been found at the entrance of Chrysospilia and this has helped the creation of legends, which describe the cave as a hideout of the inhabitants from pirates.
There are steps that lead to the cave which were built in ancient times and are known as "Greek steps". However, the access is difficult and dangerous, especially when strong winds blow. The cave is also accessible by sea, but the visit is not allowed since the archaeological investigation has not been completed.
