Isabela (province)

An 18th century heritage church.

An extensive protected area covering a large swathe of the Sierra Madre Mountains from the boundary with Cagayan to San Mariano town. Home to the indigenous Agta/Dumagat tribes, endemic species such as the Philippine crocodile, the Philippine eagle, the Isabela oriole, pitcher plants and virgin forests, in addition to peaks that have never been named or climbed by humans.

An isolated lake reachable only by a four-hour hike or by motorcycling on a single-lane trail, it is home to the endemic Philippine crocodile, which was rediscovered in the area in 1999. An observation tower provides sightseeing opportunities for the reptile as well as endemic birds.

Opened in 1983, it was deemed the largest dam in Southeast Asia at the time and created a reservoir that displaced numerous communities in neighboring Ifugao. Since then it is one of the main sources of irrigation and electricity in the Cagayan Valley Region. The complex and its surroundings have become a favorite recreation spot for residents as well as day-trippers from Santiago. Fishing activities are also available at the reservoir.

An annual festival celebrating Isabela's culture. Most major events are held at the amphitheater at Queen Isabela Park.