[stars & stripes forever]

RE: Undiscovered underground cities

Makes me wonder what’s going on under my feet. Sub-cities. Life underground undetected. Spooky.

[Lakeside Granny]

We all may wish we had an underground city/bunker to escape to in the near future.

[STARLIT]

Yes, and it helps me to understand why I've seen people-sight-unexplained. If there's cities under us..why not appearances of former/present people? Lots of unknown.