I'm sure it came with the place. I don't think you build one on purpose.
When I came here, I tossed something into the pit. I still haven't heard it hit. And I. Have. Good. Ears.
"Chasm Death – “Expect a plagiarism lawsuit from Wile E. Coyote."
—Comic Book Guy, The Simpsons Game.
In this land of ours, there are many great pits, but none more bottomless than the Bottomless Pit. Which, as you can see here, is bottomless.
—Stan, Gravity Falls, "Bottomless Pit!"