Mulu Hot Spring rises near the Gunung Mulu massif in Sarawak, Malaysia, a region cloaked in rainforest and famed for its karst caves. This open-air spring invites a wild bathing stop amid the jungle.
Insider tip — Mulu Hot Spring at Gunung Mulu National Park — UNESCO World Heritage Site in Sarawak, Borneo. The park is famous for the world's largest cave system including Sarawak Chamber (12 million m³). A natural hot spring in one of the world's most spectacular cave and karst environments. Combine with caving tours, rainforest trekking, and the legendary Deer Cave bat exodus (millions of bats at sunset). Access via Royal Mulu Resort or Mulu village.