has the world’s largest and most spectacular cave entrance with over 60 meters in height and 250 meters in width. There are 8 main caves located within Niah-Subis limestone massif while Great Cave, Moon Cave, Painted Cave and Trader’s cave are the four well-known caves. Niah is rich with significant natural habitat with many undiscovered flora and fauna species. Postings of flora and fauna observations are posted on iNaturist App to spark scientific interest in Niah’s biodiversity. Niah Cave is the home of half million swiftlets and is the place where it that make their nests purely from their saliva.