 The topography is of limestone that has been worn away through erosion, which later formed ridges, towers, fissures, sinkholes and other types of landforms.The Cat Ba Langur are diurnal animals, adapted to living in limestone habitat.The sleeping caves, ledges, and overhangs used by the langurs are thought to be used as protection from predators and extreme weather.Accessible caves were used as a hunting ground for humans to capture or kill langurs as they slept.