From tropical pools in Mexico to icy waters in Russia, underwater caves can be found around the world.
Divers and underwater photographers have made it possible to see these mysterious places of beauty.
Let’s take a look on some of the photos:
Mexico has thousands of underwater caves in its cenotes, like this one in Tulum.
A diver swims through a sunbeam in the Cenote Taj Mahal in Quintana Roo, Mexico.
The Gran Cenote cave in Mexico is part of the longest underwater cave system in the world.
A scuba diver swims through an ice cave in Lake Sassolo in Sambuco Valley, Ticino, Switzerland.
This photo of a cave near the cliff of Cap Canaille in Cassis, southern France, shows the cave from above and below the water's surface.
Cave divers from the Orda Cave Awareness Project explore the beautifully transparent Orda Cave in Russia's western Urals region.