While the exterior of this building may have seen better days, Montgomery Federal Prison Camp still makes this list due to its minimum security procedures and the surrounding plantation. Surrounding the campus, you’ll notice that the grass is well kept, the flowers and smaller trees are in locations that compliment the building very well. Again, although it isn’t the most beautifully structured building we’ve seen so far, it still deserves its own spot. Montgomery Federal Prison Camp is located in Montgomery, Alabama on the grounds of Maxwell Air Force Base and is home to nearly 900 inmates.