The Maya called the world beneath the earth “Xibalba” and it was a place reserved for shamans and kings (and their sacrifices!). To explore this piece of the Maya underworld, you must hike about 45 minutes, wade across a river three times, and swim through a short stretch of deep water. While in the cave, sometimes you will be walking, other times swimming or climbing over rocks. The reward is a unique and unforgettable experience.