These petroglyphs were carved and painted into a sandstone wall (in what is now Dinosaur National Monument, Utah) about a thousand years ago by members of a semi-nomadic culture known as the Fremont:

This site, called the “Swelter Shelter,” was a seasonal dwelling for the Fremont, only used for part of the year as they followed available food and water.  But apparently conditions here were sufficiently hospitable that the Fremont had a little spare time for art.

Should you ever make it to Dinosaur National Monument, this is just one of a number of fairly easily visited sites along the Tour of the Tilted Rocks Scenic Drive, not far from the Visitor’s Center.