This was pretty impressive. A short drive from Vegas and a quick loop around. The loop is one-way and you can only stop at the visitor center at the beginning so don't do what my husband did and think you'll stop at the end. :/
Most of the impressive views are at the beginning. When we went there were lots of hikers and rock-climbers which only helped to illustrate how massive these rock formations are.
Military annual pass gets you in free.