Cagayan is well-known for its abundance of cave systems and one of the spectacular caves in the province is Callao Cave, which has seven chambers. This cave is famous for the natural cathedral formed inside the cave. This cathedral-like chamber is now transformed to a chapel by the local people.
Each of the chambers has natural crack and fracture formation, which allow the sunlight to get inside the cave. Unlike dark and scary caves, Callao Cave has natural sunroofs – a good and dramatic lighting effect for a photoshoot session!