In late 2020, the appearance of a series of metal columns was reported internationally. Referred to as "monoliths", these sheet metal structures began to be constructed in the wake of the discovery of the Utah monolith, a 3 m (9.8 ft)-tall pillar made of metal sheets riveted into a triangular prism, placed in a red sandstone slot canyon in northern San Juan County, Utah. The structure was placed there sometime between July and October 2016 based on images from Google Earth, but only attracted media attention after it was reported in late November 2020 by state biologists who discovered it during a helicopter survey of wild bighorn sheep.