The Fort Knox Historic Site features one of the best-preserved examples of coastal defense fortifications constructed in the mid-1800s. It is America's first fort named after Major General Henry Knox. The PNO is the tallest bridge observatory open to the public in the world.

Fort Knox, now Fort Knox State Park or Fort Knox State Historic Site, [1] is located on the western bank of the Penobscot River in the town of Prospect, Maine, about 5 miles (8.0 km) from the mouth of the river. Built between 1844 and 1869, it was the first fort in Maine built entirely of granite; most previous forts used wood, earth, and stone ...

Located on the west bank of the Penobscot River in Prospect, Maine, in an area known as the Penobscot Narrows, Fort Knox is one of the best-preserved military fortifications on the New England seacoast.

Discover America's Original Fort Knox - Prospect, Maine Regular Operating Hours: May 1 thru June 30 - Fort Knox Historic Site* and Observatory open from 9 am to 5 pm - Fort itself remains open until 6 pm

The Penobscot Narrows Bridge and Observatory is the crown jewel of coastal Maine, offering spectacular 360-degree views of the Penobscot River and Bay, the Maine countryside and the distant western mountains.

The Penobscot Narrows Bridge and Observatory is the crown jewel of coastal Maine, offering spectacular 360-degree views of the Penobscot River and Bay, the Maine countryside and the distant western mountains.

A wonderful two-for-one attraction combining Maine History and astounding views from the 400' foot bridge elevator observatory. The Fort Knox State Historic Site and new Penobscot Narrows Observatory are outstanding examples of 19th and 21st Century engineering marvels.

Fort Knox is Maine’s largest historic fort, with an observatory taller than the Statue of Liberty. It is a landmark bridge that spans the Penobscot River, and allegedly, a few ghosts comprise the Fort Knox State Park in Prospect.

American Revolution. General Knox lived in Thomaston, Maine during the final years of his life. America's other Fort Knox, which is located in Kentucky, is also named after him. Fort Knox's granite was quarried on Mt. Waldo, located about five miles upriver from blocks were transported down the mountain, wharf.

Maine’s largest historic fort, it features stunning military architecture and master granite craftsmanship. Constructed between 1844 and 1869, the fort was strategically located on the narrows of the Penobscot River, protecting the City of Bangor and its surrounding area.