Koh Chang

Koh Chang is Thailand’s most biodiverse island, offering over 70% forest cover and seven major waterfalls. Spanning 429 km², it’s the second-largest island in the country, yet it remains far less commercialized than Phuket or Koh Samui. The rugged interior rewards hikers with trails leading to Klong Plu Waterfall, where a 30-meter cascade drops into a natural pool. Unlike Bottle Beach (rank 10), which requires a boat for access, Koh Chang has a well-maintained road network, making exploration easy. The west coast’s White Sand Beach sees the most tourists, but east coast beaches like Lonely Beach offer quiet stretches for a fraction of the cost—expect bungalows starting at just $20 per night. With year-round warm waters averaging 28°C, it’s ideal for snorkeling and kayaking.