South Dakota is a hidden treasure. Sure we have Mt. Rushmore, but that’s not what makes it special. We have Crazy House Monument and the Badlands, Harney Peak and Jewel Cave. My favorite treasure in the Black Hills is Iron Mountain Road, one path that leads to Mt. Rushmore. Its corkscrew highway and massive timber bridges are a testimony to the perseverance of man to dominate nature. It winds its way through Custer State Park. There are several one-lane tunnels one of which frames Mt. Rushmore in the distance.