Pictured here are two of the Blyth Intaglios. These large pre-Columbian artifacts were created on the ground, but obviously meant to be seen from above. The site is located north of Blythe, California just west of the Colorado River (which is the California/Arizona border).

The photo was captured from above using a drone. For a four minute video of the site (actually better than this still photo), see the following link:

https://www.youtube.com/watch?v=M_LZl4Nhu-s&t=46s