This is a Civil War-era coastal defense fortification at the mouth of the Kennebec River in Phippsburg, ME. It's in sight of the short-lived Popham Colony and named for George Popham, the colony's leader. The area is preserved as Fort Popham State Historic Site.
Landmarks, Military - Historic - Forts and Batteries, Buildings - Novelty / Interesting, Buildings - Misc, National Register of Historic Places (NRHP)
Links: en.wikipedia.org
By: Fab