(Maine)
Fort Edgecomb, built in 1808–1809, is a two-story octagonal wooden blockhouse with restored fortifications located on Davis Island in the town of Edgecomb, Lincoln County, Maine, United States. It is the centerpiece of the Fort Edgecomb State Historic Site. It was added to the National Register of Historic Places in 1969, with its boundaries increased to create a historic district in 1991. (Ref: https://en.wikipedia.org/wiki/Fort_Edgecomb)