Locals from a village in Wales have been left baffled after spotting a 10-foot metal structure which seems to have appeared out of nowhere.
Walkers were left scratching their heads after the mystery structure, which is shaped like a giant Toblerone, popped up on Hay Bluff near the town of Powys.
The sighting is one of many across the UK and the US over the last few years.
Back in 2020, there were a number of sightings in isolated areas across Europe, including at Compton Beach on the Isle of Wight, meanwhile the Merry Maidens stone circle in Cornwall attracted hundreds of social media users.
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So what is it, and where has it come from?
Well, some think it's the work of aliens, while others believe it's an elaborate piece of artwork.
But in case you were wondering, it's not Banksy. One of the structures popped up in 2020 with the words 'Not Banksy' scribed all over it.
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So, that clears that up!
Richard Haynes, who took photographs of the latest sighting while running on Hay Bluff, told WalesOnline: “I went off towards Hay Bluff towards where the trig point is and I looked over to my right.
“I thought it looked a bit bizarre and might be a scientific media research thing collecting rainwater.
“But then realised it was way too tall and strange for that. Then I went up to it and it was about 10-foot-tall at least and triangular, definitely stainless steel.
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"It was hollow and I imagine pretty light. Light enough for two people to carry it up and plant it in the ground.”
It seems that the metal structure has only recently popped up in Hay Bluff.
One of Richard's friends said he was only in the area a couple of weeks ago and the structure wasn't there.
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“I did notice on Google that it’s popped up fairly recently and from what I can gather it disappears after a couple of days,” Richard added.
The sightings have drawn some criticism from locals and others online, who are concerned over its appearance. Although they are rather intriguing, some say they’re tacky and could be detrimental to the environment.
“I don’t know about that, but it’s clear someone would have had to have dug a large hole to get it in the ground," Richard added.
Have you ever spotted one of these? We need some answers!
Lucy Devine