1. Kapurpurawan Rock Formations, Burgos, Ilocos Norte

2. Biri Rock Formations, Biri Island, Northern Samar

3. Nakabuang Arc, Sabtang Island, Batanes

4. Alapad Rock, Batan, Batanes

5. Apo Island Rock Formation, Negros Oriental

6. “Boto ni Kukarog,” Bagamanoc, Catanduanes

Source: http://www.rappler.com/life-and-style/travel/ph-travel/60623-philippines-rock-formations