In many situations, however, ecotourism fails to deliver on its promise. Many researchers have studied ecotourism's failures as well as its successes. (Amazon interactive)

Responsible tourism – or ecotourism – in hotspots and high-biodiversity wilderness areas can be both a sustainable economic alternative and a successful conservation strategy. (Conservation International)

Ecotourism encompasses a spectrum of nature-based activities that foster visitor appreciation and understanding of natural and cultural heritage and are managed to be ecologically, economically and socially sustainable. (Tourism Queensland)