One of Thailand’s oldest and most biodiverse rainforests, Khao Sok National Park is a sanctuary of life and wonder. Towering limestone mountains, ancient trees, winding rivers, and mysterious caves make this a paradise for explorers. The rainforest here is over 160 million years old—older even than the Amazon—and is home to elephants, hornbills, gibbons, and the rare Rafflesia flower, the world’s largest bloom.