When you hear the words 'doomsday bunker' you probably don't imagine anything particularly glamorous, but that didn't stop luxury real estate content creator Enes Yilmazer from investigating a whole bunch of them.
A couple of years ago, he visited a remote part of South Dakota to check out the world's biggest plot of doomsday bunkers, each of them costing somewhere in the region of $45-55,000.
After travelling and staying a night, the YouTuber and his team got a pretty in-depth tour of a couple of bunkers, to see what they looked like inside.
Despite visions of metallic bunk beds and fluorescent lighting, it turns out these bunkers are actually quite homey.
They can be decorated in a variety of ways, although Yilmazer first gets to see a vacant bunker to get a sense of their maximum size.
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Each is a sort of domed tube, buried in the earth but poking out like a mound, and there's scope for owners to design the interior as they like.
One of the more complete bunkers in the video features quite a lot of wood panelling and a nice little kitchen, with all of its power and gas lines plumbed in properly.
There's a living area with some nice sofas and chairs, and the whole space has hanging lights that really don't make it look like a survival bunker.
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A long corridor goes to the back of the bunker, with doors to the right and left leading to bedrooms and bathrooms.
These feature proper beds and more wood panelling to make them seem all the more welcoming and warm, with a little entertainment room looking really snug and chill.
At the time of the 2022 video, the owner of the facility told Yilmazer that he'd sold around 200 units so far, with hundreds more in the works, and you'd assume that more will have gone since then.
Amazingly, even though most people would think these bunkers are backup options for worst-case scenarios in the outside world, he also said that there were around 30 families already living in their bunkers full-time.
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With 99-year leases, though, these aren't permanent purchases, but rather a sort of really long-term rental, so it might not be for everyone.
People in the comments under the video aren't all completely won over by it all, with one person pointing out: "I wish these houses could be connected underground through a tunnel so that families can see each other."
It does indeed look like a quite isolated existence - but, then again, that's the bunker life.