Your drive takes you through a grassy desert landscape and somewhat rolling hills... and then all the sudden you find yourself surrounded by massive boulders.
There happens to be a rest stop right in the middle of all the beautiful rocks. It's a great scenic stop. Even if you don't have to pee, I recommend stopping to soak in the scenery.
Here is an image that shows you the scale of some of these rocks. Look closely and you will notice a father carrying his son. Yep, These things are gigantic!
Oh, and you can also pick up GC15KE5 while you're there!