Discover Dos Ojos (Two Eyes) Cenote, one of the Yucatan's most spectacular underwater cave systems where crystal-clear freshwater creates an otherworldly swimming experience in cathedral-like caverns that the Maya considered sacred gateways to Xibalba, their mystical underworld. Snorkel or swim in the perfectly transparent water where dramatic stalactites and stalagmites create natural sculptures illuminated by shafts of sunlight filtering through openings in the limestone ceiling, creating an almost spiritual experience of floating in liquid crystal surrounded by millions of years of geological formation. Learn about the cenotes' crucial role in Maya cosmology as sacred pools where offerings were made to gods, where souls journeyed after death, and where shamans communicated with supernatural forces that controlled rain, fertility, and cosmic harmony. Experience the unique sensation of swimming between freshwater and saltwater layers in this natural aquarium where tropical fish, turtles, and unique cave-adapted species create an underwater ecosystem that exists nowhere else on Earth, while understanding the geological processes that created the world's largest underwater cave system stretching for hundreds of kilometers beneath the Yucatan Peninsula and providing the only source of freshwater in this tropical region. The cenote is open 8 AM to 5 PM most days, and entry is around $18 per person.