To visit here, you need to first go to the Fort Sill visitor center with your ID to get a day pass. Apparently there’s a golf course and bowling alley because people were coming to play there. The museums are free, and there’s 2 museum areas. My kids loved seeing how there is an entire city inside those guarded walls. There’s a Pizza Hut, Burger King, basketball court, gas station, etc. Behind the buildings opposite the gift shop (which wasn’t open), there’s a nice playground. There’s a large lawn for playing/relaxing. We could have spent the entire day.See more..