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