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There's an entire year-round indoor beach with bungalows and a small forest near Berlin: https://www.tropical-islands.de/en/

Better photos e.g. here: https://www.dailymail.co.uk/news/article-2236995/The-worlds-...

I'm sure it needs plenty of energy, but I'd also bet the glass dome plays its role.

Found it online when was again thinking about how to live through the northern winter.

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The building sure wasn't designed for that, however, it was supposed to be a hangar for the cargolifter airship. Went bankrupt with a lot of other things around the dotcom 1.0 failure era.

> I'm sure it needs plenty of energy

So much that it has its own power plant, as far as I know.

Environmental issues aside, pretty cool to stand there in swimming trunks when it's -10 outside and there's half a metre of snow against the glass walls though.

I’d not be surprised if they have a power plant. Not because they need a huge amount of electricity, but it’s a bit remote, so it might have been more economical to just build a generator hall than to get grid access and they can use the waste heat from generators to heat the building which substantially improves their energy efficiency.

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