The 4,000 Islands, or Si Phan Don as it’s officially named, is a riverine archipelago just north of Laos’ border with Cambodia. You’ll find thousands of islands sprinkled for miles along this wide stretch of the Mekong. Don Det is the most commonly visited island. Its low-key island vibe, riverfront barefoot restaurants, and guided adventure paddling tours make it an incredible destination for every travel-loving paddler.