We visited Fort Knox while on our 2009 fall trip to Acadia National Park. This is an amazing preserved fort and we were fortunate to include it in our short visit to New England. We wandered the grounds taking in all the views, military architecture and history of the area.
We also visited the Penobscot Narrows Bridge and Observatory. This is a wondrous viewing area of the area. A must if you are in the area, especially in the fall.