Why are there giant concrete tunnels in the desert?

230819 Like and subscribe. This is an archive, check the link in the end if you are owner. The Physics Girl team visited LIGO once again. This place is Dianna's obsession.

If you liked this video check out these:
I Visited the First Gravitational Wave Detector! LIGO | STELLAR
https://www.youtube.com/watch?v=jtp71NT0GNg&
Why aren't plants black? :herb:
https://www.youtube.com/watch?v=3BRP4wcSCM0&
Thanks to LIGO Hanford, Michael Landry, Amber Strunk, Sharan Banagiri and Salvatore Vitale.
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