Grutas de Aktun Chen, Tulum

66 kilometers from the center of Cancún are the Aktun Chen Caverns, formed naturally more than five million years ago. You can find curious forms of stalactites and stalagmites. This ancient system of caves is a big challenge for the most daring of spirits. The tour is done in groups, with a bilingual guide, who explains all the details about the cavern and answers all of your questions. Ask at your hotel reception about the tours and group transport. It is open daily at 9a.