Here is a cool site:
The most interesting thing about this is that those of you on the
list who live in the regions described, could actually investigate
the sites.
Muvian or Lemurian ruins in California? Giants in the
Southwest? Giant rock faces and artifacts in Utah?
There's a good concise piece on the subterranean cities of
Turkey.
Not too in-depth, but this site gives some good "starter"
information for anyone looking to dig deeper!
--Mike