Over the last years, the island of Kalymnos has gradually developed as a rock climbing destination. Its landscape is mountainous and the characteristic feature of Kalymnos is its many caves. The mountains on the northern side of the island and the neighboring island of Telendos are the most popular sites for rock climbing. Other interesting sightseeing in Kalymnos is the Monastery of Agios Savvas and the Medieval Castle of Chryssoheria. Visitors should also not miss a boat trip from the port of Myrties to the island of Telendos, a secluded place with naturist beaches.