[cgbg]

See post 5—lots of airport stuff and a lot lot more...

Fasten your seat belt. You are not in Kansas anymore.

;-)

[ansel12]

Thanks, I guess it is still a thing.

[Pete from Shawnee Mission]

Wait a moment....We have a bunch of tunnels around here in Eastern Kansas and western Missouri!

https://www.onlyinyourstate.com/missouri/subtropolis-mo/

https://www.archives.gov/publications/prologue/2016/spring/historian-frcs.html

https://www.kcur.org/show/central-standard/2014-09-17/the-types-of-things-lurking-underground-in-kansas-citys-caves

https://cloudandcolocation.com/datacenters/cavern-technologies-lenexa-data-center/