“The underground of the city is like what's underground in people. Beneath the surface, it's boiling with monsters.”
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Guillermo del Toro 19
Mexican film director 1964Related quotes

“I prefer neurotic people. I like to hear rumblings beneath the surface.”
“I'm hiding underground, I can't hear no sound”
Hidden (2017)

“Oak… lasts for an unlimited period when buried in underground structures.”
...when exposed to moisture... it cannot take in liquid on account of its compactness, but, withdrawing from the moisture, it resists it and warps, thus making cracks.
Source: De architectura (The Ten Books On Architecture) (~ 15BC), Book II, Chapter IX, Sec. 8

“Do you not know that the underground lands are shared by many worlds?”
Aeaea, Ch. 6
Space Chantey (1968)
Context: Do you not know that the underground lands are shared by many worlds? It is all one underground, a vast place, and it is but a trick on which globe one will surface on coming out. This is the reason that the inside of every world is so much vaster than the outside. You are fooled by the shape of these little balls on which things live and crawl; you see the universe inside out; you see the orbs as containing and not contained. I will teach you to see it right if you please me.