This Biosphere Reserve called Sian Ka'an, "where the sky is born" or "gift from heaven" in the Maya language, is unique in the world for its diversity of biological species, both animals and plants. The area has been declared a UNESCO Biosphere Reserve. Sian Ka'an offers visitors the services of knowledgeable guides familiar with the flora and fauna here, as well as with the ancient Maya culture, an ideal way for visitors to penetrate one of the Riviera Maya's most exciting and rewarding locations.