Penobscot Narrows Observatory
740 Ft Knox Rd, Prospect, ME 04981, USA
View On Top of Maine A view from the top, the tallest bridge observatory can be found in Maine of all places in the world. The tower reaches 420 feet (128 m) into the air that allows visitors to view the bridge, the nearby Fort Knox State Historic Site, the Penobscot River, & the Bay. The bridge is a fabulous treat to any visit to Fort Knox allowing you to fully inhale the beauty of the surrounding area seeing as far away as Cadillac Mountain in Acadia National Park.