That's where the mutants live. Also, there's a thousand year old, old New York City buried underneath that had bathroom booths with phones in them.
And those weird booths that look like suicide booths, are no suicide booths. I love you, meatbags! Hello, it’s me, Bender Rodriguez!
Argelio
Don't touch the weird pink goo you find down there either.
And if your name is Winston, it's just best if you stay above ground, or stick to the subway system.