Ozone Cave

Granite boulders push through the walls and windows of this boutique resort on Koh Phangan's quieter northern tip, less a design choice than a geological fact the architects decided to work with. It sits a short walk from the calm Thong Nai Pan Noi beach, which puts it at a deliberate distance from the full-moon party circuit. A seawater pool faces the treeline, and the on-site restaurant covers Thai and international ground.