In this captivating short film, photographer Jonas Pedersen and diver Christoffer Brenna explore the haunting underwater cave system of El Toh, a cenote in Yucatan, Mexico.

As the duo navigate through the craggy passages, you can catch surreal glimpses of Brenna's reflection against the glassy canvas of the water's surface.

The word "cenote" comes from the Mayan "ts'onot," which is used to describe any geological feature that provides access to groundwater. There are many other cenotes throughout Mexico , and you can also find these intriguing watery sinkholes throughout the world, from Australia to Africa.

Although El Toh's watery depths are incredibly dark, Pedersen captured this footage using a camera that boasts a staggering ISO capability of 50,000. For all the non-photographers out there, that basically means the camera has outstanding "night vision" in low-light photography situations. This allows for spectacular clarity of all the stalactites and stalagmites festooning the watery cave system.

Catie Leary ( @catieleary ) writes about science, travel, animals and the arts.

Watch as cave divers explore the eerie depths of Mexico's El Toh
Planning to take a plunge in an underwater cave anytime soon? Don't forget your camera!