At Sian Ka'an you can kayak through narrow canals between mangroves, climb an ancient pyramid, float in a crystal clear cenote, or try your hand at saltwater fly fishing, visit Muyil lagoon and its ruins, savor the sunrise here and you'll understand why the ancient Maya named this place Sian Ka'an, which in their language means, "where the sky is born." —all within a lush protected environment south of Playa del Carmen and Tulum.