Cañon del Sumidero - An ecotourism park on the Grijalva River describes their activities, which include swimming, hiking and shopping. [English/Spanish/Italian] - http://www.sumidero.com/
Lacandonia - Rustic bungalows located near Montes Azules Biosphere Reserve. They describe natural and cultural expeditions, with rates and travel information. - http://www.lacandonia.com.mx/
Chiapas Department of Tourism - Government site provides list of tourism operators, with information on history, food, and culture.[English/Spanish/French/German/Italian] - http://www.turismochiapas.gob.mx/
Chiapas Tours - Private tours to a variety of locations, including natural and historic sites. [English/Spanish] - http://www.chiapastours.com.mx/
TravelChiapas.com - Comprehensive information for tourists and travelers to Chiapas. - http://www.travelchiapas.com