https://www.mercurynews.com/2020/12/04/california-monoliths-removal-by-punks-from-socal-outrages-locals/

The appearance of a 10-foot-tall steel monolith in Atascadero’s Stadium Park may have been mysterious, but it was far from sinister.

For a day after its discovery Wednesday, curious locals hiked up to check out the new arrival on Pine Mountain. And then, overnight, it was gone.