Native Choice. Ivan and David know all there is to know about Cosa Maya sites like Chacchoben, Kohunlich, and Dzibanché. Aside from archaeology-themed outings, their company has tours that focus on adventure and contemporary Maya culture, too. Paseo del Puerto 1021, corner of Chinchorro, Nuevo Mahahual, Mahahual, Quintana Roo, 77940. 983/103–5955 or 998/869–3346. www.thenativechoice.com. From M$810.