Ecoturismolatino 
Guide to protected areas in Latin America, with suggested itineraries and contact information. [English and Spanish]
http://www.ecoturismolatino.comBig Volcano Ecotourism Resource Centre
A directory with worldwide links about ecotourism practice, ecologically sustainable development and general tourism and travel best practice management.
http://www.bigvolcano.com.au/ercentre/ercpage.htm
Earthfoot's Ecotour Posterboard
Provides worldwide links to local guides for personalised eco-tour experiences.
http://www.earthfoot.org/
Eco Tour
Directory of ecotour operators with search by country or keyword.
http://www.ecotourdirectory.com/
Responsibletravel.com
Lists eco-friendly holidays with search by country and activity, and links to individual operators.
http://www.responsibletravel.com/
Planeta.com
Virtual library archiving articles about ecotourism and conservation. Includes contacts and bibliographies.
http://www.planeta.com/
