On the northern tip of Sabtang Island, a natural limestone arch frames a small cove where volcanic rock meets the sea. The arch itself — called Nakabuang — is not enormous, but its position is perfect: you can stand inside it and look out through the opening at the Pacific, with the green hills of Sabtang rising behind you and the ocean ahead. It is the kind of scene that photographs well and looks even better in person.
The site is part of the Chamantad-Tinyan area, named for the beach below and the headland above. Reaching it involves either a walk from Chavayan village along a coastal track (around 30–40 minutes each way) or a boat around the island. The walk is manageable but exposed, so carry water and go in the morning before the sun gets high. Most visitors combine the arch with a tour of the Sabtang stone villages in the same day.