Niah Great Cave is alive with 40,000 years of unwritten history, because it was inhabited by humans at at least 40 millennia ago. The caves are the site of some of the oldest human remains discovered in Southeast Asia. You will not be the only visitor to this magnificent cave. It is the haunt of local Penan tribesmen, who make a living collecting edible birds nests built high in the cave walls by swiftlets. The birds’ nests are prized by Chinese gourmets around the world. After the Lubang Padang you enter a totally dark passage known as Moon Cave (Gan Kira). It is essential to bring a flashlight,- not only to find the way but also to admire the remarkable rock shapes and weathering effects.