The first unexplained metal monolith appeared in November 2020 in Utah's remote Red Rock Country. Apparently, the 10-to-12-foot tall monolith had been placed there sometime in 2016, based on Google Earth images, according to Monolith Tracker.
After it was removed, another monolith appeared in Romania and multiple monoliths appeared in California before year's end. Also in December 2020, a sculpture similar to the one found in Utah was found on the Isle of Wight off the southern coast of England.
Then, in March 2024, another monolith appeared in Wales. Craig Muir, who found the object, which stood about 10-feet-tall, on a hike, said, "It almost looks like a UFO."