Classification of Caves
DENR Memorandum Circular 2007-04 (Procedure in Cave Classification) prescribes the following classes of Caves in the country:
Caves with delicate and fragile geological formations, threatened species, archeological and paleontological values, and extremely hazardous conditions. Allowable activities are limited to mapping, photography, educational and scientific purposes.
Kaungugan Cave in Abra (Cordillera Administrative Region)