Cudugnon Cave is located in El Nido, Palawan, Philippines.

Found west of Lagen Island, Cudugnon Cave, although located on the mainland of Palawan, is best reached by boat. Once touted as an important archeological site for evidences of Neolithic burials, looters have swiped it clean of artifacts, save for a few bones. It is nevertheless an interesting site, as visitors will have to crawl through a small hole to enter the main cavern, which leads to a smaller cavern.

Source:

Palawan.ws