[missing people in red & blue notes, military tunnels in black]
[SW tunnel systems]
Unused tunnel under Atlantic Avenue in Brooklyn. (Courtesy of Steve Duncan)
Tunnels consist of:
- Abandoned military bases
- Unused Plumbing & utility tunnels
- deserted subway systems (many cities have done this)
- And mine shafts
RESOURCES
https://www.huffpost.com/entry/14-american-cities-with-c_b_8979266
https://urbexunderground.com/7-abandoned-military-bases-in-the-us/
https://nypost.com/2020/07/04/why-hundreds-of-people-vanish-into-the-american-wilderness/
https://mysteriousuniverse.org/2019/08/bright-colors-strange-entities-and-baffling-vanishings/
The Conspiracy Manifesto 