India, Sept. 17 -- With all the rustic camping, uphill hikes and early mornings that make you wince, eco-tourism, at first glance, doesn't sound like the most luxurious way of vacationing. But what if we told you it doesn't necessarily mean giving up on comfort and everyday luxuries? When eco-resorts enter the picture, your sustainable vacation doesn't have to be limited to nature camps and mosquito nets and canned food.

Around the world, these resorts are finding intelligent ways to care for the planet while offering incredible experiences. Picture treetop pods in Switzerland, sun-drenched villas in the Maldives, rainforest retreats in Sri Lanka or cliffside hideaways in Santorini. Each stay shows that traveling responsibly can still fe...