The Yucatan Peninsula sits above the world's largest underground river system, its limestone landscape punctuated by cenotes — natural sinkholes that open into clear, cool water far below the surface. Chikin Ha is among the most striking, a network of caverns and open pools that has drawn people to its waters for thousands of years.

This guided excursion takes guests into the cenotes with time to swim and explore the formations surrounding each site. Refreshing and quietly otherworldly, it is an encounter with a part of the Riviera Maya that most visitors never see.