TULUM THE "WALLED CITY" This city within walls was only inhabited by the nobles, high priest and esteemed citizens such as astronomers whereas the lower classes lived in simple wood and thatch huts. Tulum is a spectacular Mayan city built in honor of the sun god, atop a cliff, overlooking the great Caribbean sea, with one of the most interesting structures as THE TEMPLE OF FRESCOS. XEL-HA, known as the world's largest natural aquarium is a vast area of protected inlets and lagoons, home for many varieties of colorful tropical fish. Where you can tube down a lazy river, jump into natural wells fed by subterranean rivers, swim in lagoons, snorkel in springs, dive in an underwater paradise, see turtles, dolphins, a floating bridge, a Mayan cave or rest in a shady hammock. Immerse yourself here and now in a natural place of magic and wonder.