(Photo: Kantemo Serpientes Colgantes)
Near the village of Kantemo, Quintana Roo, Mexico, there's a cave. It's a popular tourist attraction--and for good reason! Snakes like to hang down from holes in the ceiling of the cave. It's a handy place for humans who want to get on eye level with snakes.
But there's more! If you're not into snakes, then you can also see the many, many bats that live in the cave. That's what the hanging snakes usually prey upon. E. Alvarado Reyes writes for Atlas Obscura:
The Cave of the Hanging Snakes is actually known as the "Bat Cave" by the locals of the nearby village of Kantemo. This is because the cave is home to swarms of small bats that can often as thick as a frantic leathery cloud. In order to take advantage of this delicious flying rodent population, a population of snakes has taken to living in the ceiling and high up on the walls of the cave. From their cracks and crevasses, they wait until the bats swarm as they enter or leave the cavern and then they dangle down and catch bats in their mouths. The snakes catch bats extremely quickly while they are flying through the air. They do not seem to be put off by the increasing groups of visitors who come to the cave to see their weird behavior.