Fort Knox and Penobscot Narrows Observatory
See main listingThis 19th-century granite fort sits just off Route 1 in Prospect, about an hour west of Bar Harbor. The real draw is the Penobscot Narrows Observatory, a 420-foot tower that gives you sweeping views of the surrounding countryside and water. You can buy a ticket for the fort alone (about $6.50 for out-of-state visitors) or combine it with the observatory for a better price.
The fort itself is well preserved and dog-friendly, so bring the pup if you have one. Visitors praise the friendly staff at the entrance and gift shop. The whole place works well as a stop on the drive between Camden and Bar Harbor, and the bridge itself is photogenic enough to merit a quick stop even if you skip the tower.








