Nature excursions

• Trips through rain forests, maybe
• Trips where a "carry in, carry out" policy may be observed
• Safaris without guns, say
• Trips to wildlife areas, say
• Trips to support conservation
• Trips to the Galápagos, e.g
• Trips to environmentally protected areas
• Environmentalists' excursions

Wiktionary Word definitions in Wiktionary
n. (plural of ecotour English)