Pserimos is a small island, part of the Dodecanese complex of islands in the Aegean Sea. It is located between Kalymnos and Kos islands, in front of the coast of Turkey. It spans an area of 14,5 km² with a total population of 130 residents.
The Thor Star wreck, which was a cargo ship built in 1965, lies on the sandy bottom of the sea, on the southeast side of the island. The ship was abandoned in Pserimos in 1997 and probably sunk due to bad weather conditions. It is in a depth of approximately 30m and it is in good condition, that’s why it is a very popular diving destination. The spot features an outstanding variety in marine life and excellent visibility conditions and is suitable for both novice and more experienced divers.