There is a bridge over the Penobscot Narrows and there is an observatory crowning one of the pillars offering a spectacular 360-view. We took the elevator to the top, the tallest public bridge observatory in the world, the first bridge observation tower in the United states going up 420 feet into the air! It is open only from May to Oct so make sure you schedule your visit. The bridge spans the Penobscot River and is 2,120 feet long. It is known as a cable-stayed bridge. It connects Verona Island to Prospect, ME. What a view from the top; off to the right is Cadillac Mountain, part of the Appalachian Mountain range, with an elevation 1,529 feet. Can you find the van? We watched a sailboat sail right under the bridge pulling it's little dingy behind it. Cadillac Mountain is right above the tower to the right in the distance. Knox Fort was built because during the American Revolution, and the War of 1812 Great Britain seized control of the river here and claimed the land for the c