Once you enter the area, go along the path to the main room and look southward. You’ll find an accessible tunnel on the ground. Roll a Bomb into it to clear away the rubble. Sit on the chair nearby to heal any hearts, then go through the tunnel.
On the other side, approach the group of Blessed Butterflies and play the Goddess Harp near them. This brings up a Gossip Stone. Anyhow, finish any other business you have here, then continue to the Gorge.