1. Longitude 131, Australia’s Northern TerritoryThe central region of Australia’s Northern Territory is a desert. It is a world-famous desert, though, because it features Ayers Rock – the world’s biggest monolith. It’s a harsh and bleak environment that could easily be mistaken for a spot on Mars. To those who visit the eco-friendly resort of Longitude 131behind Ayers Rock, though, the desert can only seem like a bed of roses. The resort is built into 15 huge luxury tents that feature every indulgence known to man. The fact that the resort uses no actual buildings makes it particularly kind on the environment that it is in. With everything from the air conditioning to the lighting running exclusively off solar power, there’s little pollution to worry about either. Activities at this resort involve hiking, amateur astronomy dining out under the stars.