Just 75 miles from Las Vegas, in Utah, was the gold-mining town called Gold Butte. Now its few remaining relics are breaking down and some local people are realising that Obama was right to seek legal protection of the delicate site.
Some of the sandstone near Moab, Utah, has petrographs of big-horn sheep caravans.
Also, in the Mojave Desert, are images of goat-like creatures. No-one seems to know their origin but do realise they will soon weather away.
Who were these artists? What were they saying? When were they active? What was their life-style?
Wake up America.