Libby Island Light stands on South Libby Island off Machiasport, Maine, marking the mouth of Machias Bay and continuing to serve as an active aid to navigation on the state’s northeastern coast. Authorized in 1817, the station lost its first wood-frame tower around 1822 and gained the present granite lighthouse in 1823, followed by a keeper’s house in 1824 and later improvements including a fourth-order Fresnel lens in 1855. Most of the station’s buildings are gone, but the tower, the 1884 fog signal house, and a boat landing remain. The light was automated in 1974, converted to solar power in 2000, and the island later became part of the Petit Manan National Wildlife Refuge.

Machiasport, Maine · USA