Antarctica holds a pretty persistent allure for conspiracy theorists and regular people alike - it's one of those bits of the Earth that's enduringly mysterious.
Now, it's got a new (albeit small) chapter in the long history of conspiracy theories about what could be hidden in its huge frozen wastes - after a Reddit user found an interesting-looking anomaly on Google Maps.
The user realg00n posted two images to a conspiracy theory community on Reddit (where else?) both screenshotted from Google Maps' satellite imagery and showing what looks like a large oblong shape jutting out of the snow.
The first shot is zoomed-out and shows the object near some craggy rocks, while the second is much more tightly cropped to give a closer look at it.
Without any bias, it is indeed an interesting-looking structure, one that could be multiple things, and the post suggests that it's a "massive door", as far-fetched as that might seem.
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The comments under the post are full of people theorizing what it is, too, including some pointing out the structure's proximity to a Japanese research base called Showa Station.
One person commented: "I just love the mystery of Antarctica, wish we know more," while another was firmer in their belief that they knew what was going on: "I bet it's a clone reptile base."
Still, it's further down in the comments that the most rational and most likely correct answer is uncovered, by a more straightforward and detailed response.
A user who seems to know the area said that the perspective of the image was confusing people: "No, it's flat on the ground. It's part of a glacier poking through the ice below. It's pretty obvious."
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When the original poster challenged this verdict, though, saying: "That still looks like a door to me," the next response was a bit of a slam-dunk.
The commenter replied: "That's because you're using bias to see what you want to see. Next door there are LOADS of these 'structures' that are actually ice and rock. Also, if that's a door... It's 93 meters tall... And flat on the ground facing towards the sky… But you know, you believe whatever you want to believe…"
That's a comprehensive rebuttal, backed up by another image that clearly demonstrates the so-called 'door' is very near to a debris field of other glacier outcroppings that look pretty similar.
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So, while you could still look at the original image and wonder just what it really is, it's hard not to think that the answer is 'ice from a funny perspective', rather than anything that indicates a far-reaching international conspiracy to cover up secret Antarctic bases.