Under the jungle floor along the Yucatan Peninsula, thousands of limestone sinkholes and flooded cave systems--called Cenotes--await adventurous divers who don't mind close quarters. This is what it's like to explore them for the first time
Though I’d never seen tankless dive gear in action, the benefit of this system—so small it fitted in a backpack—was obvious. It was light and portable. Not only would it give people access to hard-to-reach bodies of water but it would also serve as “a gateway drug to scuba diving” given you don’t need a scuba certification to try it.