shit tunnels

https://www.youtube.com/watch?v=B7RZSvuR9dE-
https://www.youtube.com/watch?v=PYWVaxadmeo

https://www.youtube.com/watch?v=LqnRTD3WT-I

https://www.youtube.com/watch?v=sxULvlzNvPU

https://www.atlasobscura.com/places/g-cans-worlds-largest-drain

https://en.wikipedia.org/wiki/List_of_largest_wastewater_treatment_plants

https://www.zoomdrain.com/blog/2022/september/the-worlds-largest-sewer-is-in-tokyo-and-its-unb/

https://en.wikipedia.org/wiki/List_of_largest_wastewater_treatment_plants

https://jf-databits.blogspot.com/search?q=shit