You can visit the ruins of Cobá and the Mayan villages of Pac Chen and Chi Much—deep in the jungle—with Alltournative Expeditions. The group offers other ecotours as well. ATV Explorer offers two-hour rides through the jungle in all-terrain vehicles; you can explore caves, see ruins, and snorkel in a cenote. Tours start at $38.50. Based in Playa del Carmen, Tierra Maya Tours runs trips to the ruins of Chichén Itzá, Uxmal, and Palenque (between Chiapas and Tabasco). The company can also help you with transfers, tickets, and hotel reservations.
Puerto Costa Maya offers a wide variety of tours exclusively for their cruise clients, including catamaran sailing tours, Chinchorro Reef excursions, Mayan-ruin tours at Kohunlich and Chacchoben, and tropical-safari jeep tours.
Alltournative Expeditions (Av. 38 Norte, Lote 3 between Av. 1 and 5, Playa del Carmen. 984/873-2036. www.alltournative.com). ATV Explorer (Carretera 307, 1 km (½ mi) north of Xcaret. 984/873-1626). Maya Sites Travel Services (719/256-5186 or 877/620-8715. www.mayasites.com). Tierra Maya Tours (Av. 5 and Calle 6. 984/873-1385). El Tucán de Costa Maya (Av. Mahahual, at Artesan Market. 983/834-5911. www.tucancostamaya.com).