Trakai is an unique medieval castle among the lakes. It is the only insular castle throughout Eastern Europe. It was built on one of the numerous islands in Lake Galvė. The castle was built as a defensive fortress. After the Battle of Žalgiris/Grünwald the castle lost its defensive significance. It was turned into a ducal residence. Trakai Island Castle was the death-place of Grand Duke Vytautas. Later the castle served as a prison. In the XVII century the castle was desolated.
Trakai is located just 27 km from Vilnius. The Insula Trakai castle is an impressive place for medieval Gala banquets and concerts.