From "La Cuidadela", continue to hike up north La Costera trail 10 minutes to the entrance of the ancestral oak grove of Otin. The arch is visible from the trail (right) on the other side of the gulch called "Canal del Quejigar". A rope work is necessary for access to the arch. More than half of the opening is blinded from the angle taken for the photo. However, a better angle is hard to reach.