The lowland jungles of Khao Sok National Park, one of the wettest areas in Thailand, are believed to be the oldest rain forests on the planet. While the Thai Islands are most famous for their stunning beaches, this 161,000-acre (65,154-hectare) park boasts spectacular limestone formations, small streams, waterfalls and dense greenery that provides a home for a dizzying biodiversity.
Famous animal residents include sambar deer, gibbon, sun bears, Malayan tapir, gaur, banteng, macaque, mouse deer, porcupine and some 200 species of birds. It’s also one of the few places in the world where you can spot the planet’s largest flower, the Raffesia.
While rain is a practical inevitability, it shouldn’t hold you back from the abundant outdoor adventures on offer in the park. Trekking, boat tours and night safaris are three of the most popular activities on the menu, but park visitors can also explore the region via caving, kayaking, zip-lining, tubing, bamboo rafting and birdwatching.
Flash flooding poses a risk at Khao Sok’s waterfalls and caves during the rainy season, so if you’re planning to visit these types of sites, it’s best to go with a guide.