"Hidden within the underwater caves of Mexico's Yucatan peninsula is a secret, remote world. For the first time, and only through the use of ground-breaking diving and photographic techniques, readers can take part in exploring its breathtaking beauty. Shining a light in the "Underworld" (Xibalba, as the Mayans call the center of their culture and mythology), these stunning images from diver and award-winning photographer Martin Broen transport us into a place that few technical divers can reach-a world accessed from cenotes, water-filled gateways to labyrinths of tunnels that create the longest underwater cave systems on the planet"-- Provided by publisher.