San Juan Islands National Monument

San Juan Islands National Monument is a U.S. National Monument located in the Salish Sea in the state of Washington. The monument protects archaeological sites of the Coast Salish peoples, lighthouses and relics of early European American settlers in the Pacific Northwest, and biodiversity of the island life in the region. The monument was created from existing federal land by President Barack Obama on March 25, 2013 under the Antiquities Act.

Geography
The national monument consists of approximately 75 separate sites totaling roughly 1,000 acre in area. They are managed by the U.S. Bureau of Land Management as part of the National Landscape Conservation System.