The International Ecotourism Society (TIES), with members from 70 countries, is the world’s largest ecotourism organization--committed to fostering “responsible travel to natural areas that conserves the environment and sustains the well-being of local people." Their site lists upcoming ecotourism events and outlines guidelines for the practice of ecotourism.
Planeta.com provides a forum for those concerned with responsible global travel, offering a wealth of articles and resources on various facets of sustainable and ecologically sensitive tourism.
Sustainable Travel International (STI) is a nonprofit that educates travelers, travel providers and related organizations about measures to promote environmental conservation and protect cultural heritage. STI offers a free monthly e-newsletter entitled the Responsible Travel Report.
Big Volcano.com is an Australian guide to ecotourism and best management practices in sustainable tourism around the globe. This site provides links on certification programs, codes of conducts and ecotourism publications.
National Geographic Center for Sustainable Destinations provides resources related to Destination Stewardship and archived articles from National Geographic’s Travel Watch series.
Ecoclub.com is a global ecotourism network with members in more than 60 countries. The site has current ecotourism news and chat opportunities for members.
Green Maps provide a new vision of communities–depicting cultural and environmental assets–and help foster responsible travel. Maps are created through a collaborative, local process: see the site for the most current listing of available maps worldwide.