Sarawak is Borneo's cave-and-rainforest counterpart to Sabah — Mulu's limestone systems, jungle walks and river access that reward travellers who want underground adventure as much as summit days. Kuching is the usual gateway for culture and short rainforest trips; Mulu National Park needs its own flight or boat logistics and guided cave itineraries. Humidity is constant; plan shorter trail days and treat cave fitness (stairs, uneven floors, headtorches) as part of the booking brief.
Mulu caves and jungle
In Sarawak, Gunung Mulu drives the Sarawak & Mulu region — guided cave walks, adventure caving grades for experienced guests, and rainforest hiking between show caves and canopy boardwalks. Beginners can stick to lit show caves; tougher routes need prior fitness and operator approval.
How it pairs with Sabah
Fly between KK and Kuching/Mulu if you want Kinabalu plus caves on one Borneo trip, or combine with East Coast reefs via peninsula hubs. Open the Book here tab for Mulu and rainforest dates — park and flight seats fill in peak school holidays.
