The Power House is located on the eastern edge of the island and was built to hold a generator to supply the island with power via steam generator. Exhibits inside describe how power was obtained in the early 1900s and hosts a small display of historic photographs of Boldt Castle construction and the 1000 Islands region Nearly destroyed by a fire in the 1930s, the Power House was one of the first restoration projects completed after the Thousand Island Bridge Authority acquired it in 1977.