The object was originally spotted on November 18 by state officials helping count sheep from a helicopter.
There have been a few theories as to what this could mean, but none of them have been confirmed.
The supposedly man-made structure stood about 12 feet tall, was planted deep in the ground and made of shiny metal, making it stand out from the red rock surrounding it.
But just as mysteriously as it was found, it’s now gone.
Officials said his removal had nothing to do with them and could instead be due to an “unknown party.”
The Utah Bureau of Land Management said in a statement, “We have received credible reports that the illegally installed structure known as the ‘monolith’ has been removed from public lands of the Bureau of Land Management by an unknown party. ”
The BLM said the structure, which it described as “private property”, was removed by “a person or a group” on the evening of November 27.
He added that any criminal investigation would be handled by the local sheriff’s office.
The exact location of the monolith was never revealed by authorities, but internet detectors quickly identified its precise location, leading a number of intrepid tourists to make the difficult journey to see it.
One of them, Matt Misbach, told the PA News Agency he arrived early on November 28 to find out he was already gone.
He said, “I arrived early Saturday morning.
“When I arrived there were two young men still in their sleeping bags camping on the site. They arrived at 2 a.m. that morning.
“The monolith was gone when they arrived. ”
He said other observers told him the monolith was still there the night before.
The metal obelisk had been sunk into the red earth.
Helicopter pilot Bret Hutchings, who was part of the group that discovered it, described it as “about the strangest thing I have encountered over there in all my years of flying” .
He told local news channel KSL TV that his best guess was that she was put there by a “new wave artist” or fan of 2001: A Space Odyssey.