US Air Force Academy - FREEThis is the only Air Force Academy in the United States. The chapel is famous for its unique design that can be seen for miles away. There is a very nice museum and a huge gift shop inside the visitor center. From there, just take the short walking trail over to the chapel and you can also overlook the cadet dormitories and parade field from.
Best Time To Visit
Best time to visit U.S. Air Force Academy is from June to September