The Mulu Caves are a stunning network of limestone caves located in Gunung Mulu National Park, Malaysia. This UNESCO World Heritage site is renowned for its impressive formations, including massive chambers and unique stalactites and stalagmites. The caves are home to diverse wildlife, including bats and swiftlets, making them a vital ecosystem. Visitors to the Mulu Caves can explore various tours, such as the famous Deer Cave, which is one of the largest cave passages in the world. The park also offers opportunities for trekking, river tubing, and experiencing the rich biodiversity of the surrounding rainforest.