From many of the stops along the highway you could look over at Mt. Rushmore. On the drive there are several tunnels you drive through, and three of those tunnels are made to from Mt. Rushmore.
The Needles are granite rock formations that you can drive through. Some of these tunnels are a tight squeeze. Like the photo above. I didn't pay attention to the width of the tunnel until I saw the people in front of us touching the walls.
Our last stop along the scenic highway was Sylvan Lake. The kids took off their shoes and waded in to the cool water throwing rocks and looking at the fish. There were people canoeing, sunbathing on the beaches, and a wedding too. After a hike around the lake we stopped at the general store and enjoyed some ice cream.
This was a really pretty area of the Black Hills. We will be visiting again.