The Gateway Arch, located in the middle of St.Loui...

The Gateway Arch, located in the middle of St.Louis. It may not be the biggest national park. But it is an iconic landmark. Trams take you to the top where you can see a lot from the Busch Stadium to the casino that always lights the night sky. The view is better watching in night than day. Just don't wait until it is to dark. There always is people smoking pot outside.