The most exclusive resorts for 'people who care about the planet,' according to National Geographic

This year, the United Nations proclaimed 2017 the International Year of Sustainable Tourism for Development - aiming to help promote hotels and resorts that are both environmentaly friendly and socially conscious.

For its current, June and July issue, National Geographic Traveler magazine is celebrating the best of the best eco-friendly resorts across the world.

Below, ten of our favorites from their "21 Places to stay if you care about the planet" round-up. Captions by National Geographic Traveler.