Or an unnatural underground bunker.
Real redpill time.
Dragons are real, at least the stories that every single ancient culture the world over, had about dragons.
Thing is, they weren't talking about dragons as we know them in the fantasy type appearance, being huge four legged beasts with wings that could breath fire.
Nope, they were talking about scaley skinned, bipedal, highly intelligent beings that had the ability to fly and focus energy enough to heat things and create fires.
Every civilization has stores about them, because they were a feared and revered race, that saw humans as cattle and ruled the subterranean realm, as earth has gone through numerous near extinction events on its surface, be it from micronovas, asteroids, magnetic pole shifts, glaciation, ect. The surface of the earth is actually a very bad place to build a super city that you want to last for hundreds of thousands of years, due to the eventual cataclysmic event that will happen on a long enough timeline.
So you build underground, which is what the draco (dragons or reptilians, whatever you want to call them) did, as they have existed on this planet for a lot longer than human beings have, and know just how fragile life is in the face of super catastrophic events.
So, if you are a smart and inquisitive anon, heed this warning.
Don't fuck around in caves or around areas that are known to have many caves and subterranean cavern systems, as many people go disappearing around those areas.
Not even joking here.