Guyangan Cave System — Wikipedia

The Guyangan Cave System (Filipino: Mga Yungib ng Guyangan) is a group of caves located in the island municipality of Banton, Romblon in the Philippines. It is located in Guyangan Hill, a limestone formation situated in barangays Togbongan and Toctoc, and consists of seven caves spread in an 85.3-hectare (211-acre) area of forest land. The caves are a significant archaeological site and a national cultural treasure of the Philippines as it is the site of ancient burial grounds where wooden coffins, human skeletal remains as well as the oldest burial cloth in Southeast Asia were discovered...