Why are ancient buildings, cities and structures usually found buried underground?

Question

Why are ancient buildings, cities and structures usually found buried underground?

In: 62

Answer 1

Survivor bias. The interesting archeological sites are the ones that were protected by a big pile of dirt or sand. The ones that didn’t get buried aren’t around to look at anymore. They were sacked, demolished, renovated, or eroded. Pompei being buried in a volcanic eruption is an extreme example of this.