Its name—Spanish for “white rock”—reflects the striking karst formations that dominate the terrain.
Peñablanca is home to the Callao Limestone Formation, a sprawling network of caves including the iconic Callao Cave, which features a natural cathedral chamber used for religious ceremonies.
This cave gained global attention when archaeologists discovered the 67,000-year-old remains of Callao Man, the oldest known human fossil in the Philippines.
Beyond Callao, the town boasts over 350 mapped caves, earning it the title “Caving Adventure Capital of the Philippines.” Sites like Jackpot Cave, the country’s second deepest, and the Bat Cave, where millions of fruit bats take flight at dusk, offer thrilling eco-tourism experiences.
The Pinacanauan River, which snakes through the limestone valley, adds to the town’s allure with boat rides, kayaking, and scenic views—especially at sunrise when mist clings to the cliffs.
Peñablanca’s blend of natural wonder, cultural heritage, and scientific intrigue makes it a must-visit for adventurers, historians, and storytellers alike.