Portsmouth Harbor Light, New Castle NH

PortsmouthNH.com
The only lighthouse on the mainland of New Hampshire, Portsmouth Harbor Light (also known as Fort Point Light, New Castle Light, and Fort Constitution Light) was constructed in 1877 on the grounds of Fort Constitution, a Revolutionary War fortification.
Location: USCG Station Portsmouth Harbor, New Castle, NH map
Hours: The lighthouse can be seen from Fort Constitution State Historic Site. However, the area immediately around it is NOT accessible to the public except during open houses. See the Friends of Portsmouth Harbor Light web site for schedule.
Web site: Friends of Portsmouth Harbor Light