[Paul R.]

Subsidence events can be fun, too (image I posted to you on another thread):

https://freerepublic.com/focus/chat/4294521/posts?page=36#36

Although no significant ancient civilization was involved with that one, it seemed appropriate given your screen name! :-)

[SunkenCiv]

Subsidence events have become more common as I’ve gotten older...

Hmm, maybe I should have looked at your other post first...