Where are the only known desert intaglios (geoglyphs) in North America?

The Blythe Intaglios or Blythe Geoglyphs are a group of gigantic figures incised on the ground near Blythe, California, in the Colorado Desert. The ground drawings or geoglyphs were created by humans for an, as yet, unknown reason.

The Blythe Intaglios are the most well-known of the over 200 intaglios in the Colorado Desert. The Colorado Desert contains the only known desert intaglios in North America. These intaglios are mostly located along the Colorado River.

The Blythe Intaglios contain three human figures, two four-legged animals, and a spiral. The largest human figure in the Blythe Intaglio group is 171 feet (52 m) long. The intaglios are best viewed from the air.

No Colorado River Native American group has claimed to have made the intaglios, although some have claimed to use them. Many of the intaglios are believed to date from the prehistoric period, but their age and the identity of their creators are still uncertain.