The island of the boat is an island in Stockholm. There are boat island bridges and castle island bridges leading to Brassey and castle island. Due to its strategic location at the Baltic entrance in Stockholm, it is traditionally the site of some military buildings. But today there are only a few museums on the island, such as Stockholm's Museum of Modern Art, the Museum of Architecture in the same building, and the Museum of East Asia. There is also a Caravan Theatre on the island.