[Ditter]

Fascinating, thanks. I have a really stupid question, this is so deep underground, does a place of habitation like this get filled in by nature or by man?

[SJackson]

I believe both in this case. They’ve been recovering artifacts from this site.

[babble-on]

I think man primarily. People just build a new building on top of the old building, and the old building/ basement becomes the garbage tip.