Fort Knox on the banks of the Penobscot River, Prospect, Maine.

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Size: 4592px × 3055px
Location: Fort Knox, Penobscot Narrows Bridge, Penobscot River, Prospect, Maine, United States, North America
Photo credit: © Janet S. Robbins / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: 19th, century, defense, defenses, forts, horizontal, military, rivers