From 'Tremors' to 'C.H.U.D.,' Hollywood loves to scare us with things living underground. With 'The Pyramid' digging into theaters this month, let's look back at some memorable subterranean thrillers. 

This is what happens when you pass up the splendors of above-ground Paris to investigate the catacombs: terrifying memories come back to life and your future is in peril. 

A 36-foot gator living in the sewers of Chicago terrorizes The Windy City in this low-budget affair.

Cannibalistic Humanoid Underground Dwellers. ‘Nuff said.

“Sandworms?! You hate ‘em, right?!” Yes we do, Beetlejuice. Beetlejuice. Beetle — ah nevermind.

In this comedy sequel, a river of “mood slime” runs deep under the streets of NYC, which the Ghostbusters use to turn the Statue of Liberty into a giant mech-suit powered by Jackie Wilson tunes!

Perfection, Nevada. Population: Lots of Graboids! With snakes for tongues, these beasties are the kings of underground terror.

Sure, it's a TV movie, but... one word: Pennywise. *rocks back and forth under the shower*

Seriously, just napalm all movie sewers and subways. Especially if they’re filled with Guillermo del Toro's man-sized bug monsters.

While the titular monster shoulder-checks skyscrapers above, the parasites clinging to it attack our heroes below.

The only thing worse than a subway car manned by a guy named “Mahogany the Butcher” are the reptile things he feeds people to.

The Ancient Ones reside underground and prey on walking stereotypes that this clever horror film subverts, thanks to director Drew Goddard and his cowriter, Joss Whedon.

Released in the U.S. in 2006, this bleak, terrifying film centers on six women struggling to survive some truly nasty things inhabiting the scariest caves you've ever seen.