EntityQ891294· pop 15· linked from 35 articlesBoldt CastleSign in to savehouseConnectionsLeeds and the Thousand IslandsEntityUnited StatesCountryCanadaCountryNew York CityCityNew YorkEntityPhiladelphiaEntitygeographic coordinate systemEntityU.S. stateEntitySt. Lawrence RiverEntityJefferson CountyEntityNational Park ServiceEntityNational Register of Historic PlacesEntityThousand IslandsEntityWaldorf-Astoria HotelEntityAlexandria BayEntityU.S. Customs and Border ProtectionEntitymansionEntityGananoqueEntityJust Room Enough IslandEntityAlexandriaEntityCategoriesCastles in New York (state)Châteauesque architecture in the United StatesHistoric house museums in New York (state)Houses completed in 1904Houses in Jefferson County, New YorkMuseums in Jefferson County, New YorkThousand IslandsUnfinished castles