A national park in Ilagan, Isabela, featuring natural spring-fed pools, cascading waterfalls, and an underground river winding through limestone caves. The turquoise spring waters are surrounded by old-growth dipterocarp forest, one of the last remaining lowland forests in the Cagayan Valley. Hiking trails, rope bridges, and swimming holes make it a complete ecotourism destination.
| Category | Nature |
| Province | Isabela |
| Region | Region II - Cagayan Valley |
| Coordinates | 17.10000000, 122.00000000 |

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