Bad land National park and Caster state park(South Dakota)
I decided to start introduce national parks where we visited. This is the first one and less known place. South Dakota might be less visited area, but they have Mt. Rushmore, Crystal Cave Np, Caster state park, and so on. Why don't you go there?

Before you go National Parks, it is good idea to buy NP pass. It costs "only" 50$ for 1 year+one month. Popular national parks charge $20 for a week, so, NP lovers must buy NP pass.

When we visited the Bad land, we found the place is exactly "bad land"! It was dusk that made sceneary of this NP more majestic. Colourful sediment piles were mysteriousry beautiful. We drived winding road slowly, climbed up hills by foot. We learned beauty of wilderness.
Caster "state" park is also attractive place for wildlives lovers. We drived across the park in the dark. We met hurd of bison. Our kids, and we also, excited!
Don't miss North Dakota.