On our way home from Texas, we went to Carlsbad Caverns National Park. I hadn't been there since I was a kid, so it was fun for the whole family.
We hiked down into the main cave, which is about a mile downhill. Then you take the elevator back up to the top.
It was a great last activity before we came home. We were glad to be home after being gone over a week, but we had a great trip.