Ilagan is the capital of Isabela, stretched along the highway through the Cagayan Valley. It is a working provincial city first, not a polished tourist town, but it has enough character to reward a traveller already moving between Cauayan and Tuguegarao.
The main reason to stop is Ilagan Sanctuary, a nature park inside Fuyot Springs National Park on the lower slopes of the Sierra Madre. It gives the city its green side: caves, springs, short hikes, and Pinzal Falls. Back in town, Ilagan leans into more human stories, from the Japanese Tunnel of World War II to the Giant Butaka, a massive version of the reclining chair linked to the city's furniture-making tradition.
Do not expect Ilagan to compete with the Philippines' beach towns or mountain resorts. Its appeal is local and slightly odd: a provincial capital where corn fields, furniture workshops, war memory, and a forest sanctuary sit within the same day's travel.