This horseshoe-shaped, 10km-long island is many peoples' vision of tropical bliss. The most popular destination on Koh Rong Sanloem (កោះរ៉ុងសន្លឹម) is Saracen Bay – a crescent-shaped sweep of white sand on the island's east coast. If that's not isolated enough, the beaches on the island's western side (reached by walking trail or private boat) are home to just a few secluded resorts and tent camps, where the cares of the world seem a million miles away.
Those looking for an alternative island experience can head to the village of M'Pai Bay at Koh Rong Sanloem's northern tip. There's no photogenic white sands here (the beach is a grainy-yellow hue), and a growth spurt in the town has meant lots of construction noise. But a clutch of budget guesthouses offer a proper local vibe that will suit the more intrepid.