Whether it's a cruise around the Galápagos Islands, a tree house stay in the Amazon rain forest, or a trek in the Himalayas, nature travel gives you unforgettable sights and experiences. Even better, ecotourism drops visitors into stunning natural environments while funding conservation efforts. Travel + Leisure evaluates nature-oriented tour companies, outfitters, and accommodations based on their value, quality, and environmental stewardship. Plan your ideal adventure with the latest news, expert tips, and guides to outdoor destinations around the world.