Nihiwatu hotel - Sumba, Indonesia. Responsible luxury is the guiding principle of Nihiwatu’s eco-friendly approach. Much of the restaurants’ produce is grown in the resort’s organic garden, fed by a clever composting and water-recycling system. The hotel’s green ethos extends beyond its walls, too, with community outreach programmes in local villages, a turtle hatchery and a foundation working to clean water and reduce malaria on the island.