>>136These caves are pretty interesting. I've seen a lot of conspiracies on aliens or lost civilizations on them because of how well shaped they are.
Called the Longyou(小南海石室), they're from Southern China. They're massive, and huge, they were apparently from years ago, and they were below a few ponds. I have seen people argue they were places to escape from a flood, or they are a proof of a lost civilization.
Some believe it was a place to store grain over generations - but it'd survived without a record. Maybe it'd been a place to seek refuge during wars, but during that period, Southern China was often desolate. They were not recorded for years and were submerged, without a doubt deserving of the title, "mysterious".