The Gomantong Caves are an intricate cave system inside Gomantong Hill in Sandakan Division, Sabah, Malaysia. The hill is the largest limestone outcrop in the Lower Kinabatangan area. Situated in a Sabah Forestry Department forest reserve, the caves and the surrounding area are a protected area for wildlife, especially orangutans. The limestone hill is also the only known site for the endangered land snail Plectostoma mirabile.[1]Investigation of the guano deposits were first made in 1889 by J.H. Allard of the China Borneo Company, and the caves were first mapped by P. Orolfo in 1930. Detailed re-mapping and laser-scanning of the caves was conducted in 2012[2] and July 2014.[3]