Gunung Mulu National Park is world-famous for its amazing cave systems, the largest of which is the Sarawak Chamber, which is the world's largest cave chamber. The park also features a wide variety of wildlife, including endangered species like the Sumatran rhinoceros, as well as many different species of birds, mammals, reptiles, and amphibians. It is also known for its unique and diverse landscapes, which include rainforests, limestone formations, and a variety of rivers and waterfalls.