There's one in Arches National Park in Utah, there's one in Bruneau Canyon in Idaho Sout of Buhl ... here's a picture of that one here in Idaho:
There's nice ones in Colradao, Devil's Lake Wisconsin, Trough Creek State Park in Pennsylvania, etc., etc.
In any case, on this partcular trip, the one in Idaho was closest to our line of travel and we were unable to take the side trip to see that.
There's SO much to see on the routes we took, one would have to take 3-4 weeks to really do it any justice. Perhaps by the time Braedon is 10-12 years old my wife and I will be in a position to do just that!
Regards.