A magnificent seven-chamber limestone cave in Penablanca, Cagayan, notable for having a chapel built inside its first chamber where natural light streams through openings in the ceiling. The cave was also the site of the discovery of Homo luzonensis, a new human species that lived over 50,000 years ago. A 184-step staircase leads visitors into the illuminated chambers adorned with stalactites and stalagmites.
| Category | Cave |
| Province | Cagayan |
| Region | Region II - Cagayan Valley |
| Coordinates | 17.70670000, 121.81920000 |