Fort Knox
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. The fort has many unique architectural features, as well as a rich history behind its walls.
Waldo Hancock Bridge
The Penobscot Narrows region is rich in transportation history. Prior to the construction of the Waldo-Hancock Bridge, a ferry regularly carried passengers across the Penobscot River. In 1929, the Maine legislature authorized $1.2 million in 30-year bonds to build the Waldo-Hancock Bridge, with the understanding that the cost would be recouped by tolls. What began as a traffic necessity to accommodate the increasing number of northbound travelers on Route 1 soon became a historical and economic landmark as well as an example of engineering innovation.
Rates & Rentals
Rates and Hours
There is no limit to the time you can spend in the observatory, but please understand that there are others waiting to visit.
Observatory Hours
- May 1 to June 30: 9 AM to 5 PM
- July 1 to August 31: 9 AM to 6 PM
- Sept 1 to Oct 31 : 9 AM to 5 PM
**Fort Knox is open from May 1 through October 31 from 9AM to 6PM, and open until 7PM from July 1 through October 31. Park grounds are open year-round from 9AM to sunset.
Frequently Asked Questions
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Engineering and Construction of Penobscot Narrows Bridge & Observatory
Innovative Engineering
About the Observatory
The Penobscot Narrows Bridge and Observatory is located in the heart of midcoast Maine. The bridge spans the Penobscot River, linking the town of Prospect with Verona, just south and a bit downriver from the town of Bucksport.
Penobscot Narrows Bridge & Observatory
Taller Than the Statue of Liberty!
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. Tourists and travel writers alike have been attracted to the unique character of this structure, its historical significance and the stunning vistas. Engineering and transportation geeks are fascinated by the award-winning and innovative design.