Not long after a “mysterious” monolith appeared outside Las Vegas, another has been reported in Colorado.Photos of the structure were taken by staff of the Howling Cow Cafe at Morning Fresh Dairy Farm in Bellvue, Colorado, who posted them on their Instagram page.“We don’t know who set it up. I saw a comment saying that a local installed it for their UFO fan neighbor, but no details on if that’s been corroborated yet,” they told Storyful.Many customers were asking about the “mysterious structure”, the cafe wrote on Instagram. Credit: Howling Cow Cafe at Morning Fresh Dairy Farm via Storyful