There's a world of beauty that lies beneath Tulum's dense jungle canopy. It’s a natural treasure that tells a unique story about the region's geological history and significance to the Mayan culture. These are cenotes, otherworldly underwater sinkholes that offer visitors an unmissable aquatic adventure. Every single one of Tulum’s cenotes is a window into the Yucatan's underground river system, each with its own unique characteristics and allure.