Looks like it's river right in Cataract Canyon on the Colorado, near the Doll House. If that's where it is, you can drive kind of close. Impressive either way. Wonder how much it weighs.
Almost certainly an attention-whoring attempt by desperate "influencers". A betting man would put money on one or more of the bearded dipshits from "Diesel Brothers".
State publicity stunt. Pretty convenient that nearly EVERY article shows a state-owned drone filming wild goats and it just "happens" to catch this monolith. I got money that says this is a tourist trap.
The pic with the guy standing all weird with knife hands is photo shopped. The shadow of the man and the shadow of the metal pillar were taken at different times of day/location.