 The elevator system in the tower, which is claimed to be the fastest and tallest elevator in Maine, was installed by Stanley Elevator Company, Inc.The Penobscot Bridge site also is home to the Penobscot Narrows Observatory, the first bridge observation tower in the United States and the tallest public bridge observatory in the world.The tower reaches into the air and allows visitors to view the bridge, the nearby Fort Knox State Historic Site, the Penobscot River, and Bay.