In Tuguegarao City, we chartered a tricycle to Callao Cave jump off, one of the famous caves in the Philippines. Callao Cave is a seven-chamber cave in Peñablanca, Cagayan. Scientists and experts discovered 67,000-year-old fossilized remains of a Callao Man in 2007, a thousand years older than the Tabon Man in Palawan. This cave is situated on the Northern foothills of the Sierra Madre Mountains. Peñablanca, the name of the municipality, is a Spanish word that means white rocks because of the limestone present in the area.
