Utah monolith
The Utah monolith is a metal pillar that stood in a red sandstone slot canyon in northern San Juan County, Utah, United States. The pillar is 3 m (9.8 ft) tall and made of metal sheets riveted into a triangular prism. It was unlawfully placed on public land between July and October 2016; it stood unnoticed for over four years until its discovery and removal in late 2020. The identity of its makers is unknown, as are their objectives.