The cenotes found in Mexico’s Yucatan Peninsula have attracted people for thousands of years. These water-filled caves are connected to the world’s largest underground river systems, and they are extremely popular among cave and cavern divers from all over the world.
This subterranean cave system were formed due to the geology of the Yucatan Peninsula - a massive slab of limestone. The rainwater drains through the rock like a sponge.
The cenotes themselves form as a result of the collapse of the limestone, which creates an opening to the surface. Thousands of these cenotes are found in Yucatan.
The Yucatan's cenotes are largely accessible with an open water diver certification, but you will need a cavern diver, intro to cave diving, or full cave diver certifications to explore the deeper, more-intricate caverns.