One of only three large gypsum sand dunes on earth, the others being nearby in Guadalupe Mountains NP and in Coahuila Mexico. If I had more time, I would have enjoyed camping overnight in the “back country” away from the road or a ranger lead evening program. But I enjoyed the nature hike and the otherworldly views. I was glad to have the long-range version of the Tesla Model 3, since the round trip distances to charging stations cross the vast missile range and mountains you can see in the distance.