ME / Military44.57° N
68.80° W
68.80° W
Verified July 2026
Fort Knox Historic Site
Prospect, ME · Penobscot River
A granite coastal fort with long passageways, vaulted chambers, and views over the Penobscot Narrows.
Field note
Bring a flashlight for darker interior areas and use only open visitor routes inside the fort.
Access warning
Dark passages, stairs, and damp stone. Check seasonal hours.
Evidence line
This listing is marked documented. Practical details were last checked in July 2026. Conditions change, so use the primary source before leaving home.
Check the source: Friends of Fort Knox ↗