Every night, three million bats form a dense curl of smoke in the sky above this UNESCO-listed park in Sarawak, Borneo. Valued for its beauty, geology and biodiversity, the park’s home to 3,500 species of flower, 270 types of bird and 81 mammals, including civets, giant porcupine, racer snakes and the Mulu horned frog.
But as well as the bat exodus – best viewed from outside Deer Cave – visitors can join a night walk to see fireflies and fluorescent fungi, or climb a 30m-high hide for a dawn chorus of birdsong. You may also spot monkeys from the park’s 480m suspension bridge, one of the world’s longest; the park also boasts the Earth’s largest cave chamber in Good Luck Cave, while Clearwater Cave, at 220km long, is another record…
