Ancient Mayan folklore will be revealed while on a nine-hour adventure that includes a hike among the beautiful cave formations and swim at a hidden cenote sinkhole, plus time for shopping along Playa del Carmen's 5th Avenue strip. A ferry boat ride and excursion van ride bring you into the Yucatan jungle, where you'll be equipped with a helmet, lamp, water shoes and life jacket. Then head out on foot along slippery limestone pathways that lead to the crystal-blue waters of a cenote. This natural watering hole, nestled in the dark reaches of a subterranean cave, is part of a massive underground network of rivers and caves that remain unexplored.