Northwest 3.5 km from Sewana and about five-km southeast of Sampalan, within sound of the ocean, is an immense limestone cave known by the locals as Gua Giri Putri. Hindus worship at the holy spring inside. The entrance lies 150 meters up a steep stairway.

Climb down through a small opening, crouch under a low ceiling, then descend into tremendously deep, vaulted grottos-still and silent except for the squeaking of bats, which grows louder the deeper you go. Tradition has it the cave leads eventually to Pura Puser Ing Jagat in Pejeng.

Some of the branch tunnels lead to openings, at the far end of the cave is a breathtaking view of fertile rolling hills and green mango groves. The main shaft rises to a small lake. Without their assistance, entrance should be free.

For safety's sake, bring a friend. Besides the bats and some birds, there's a certain species of crab found in this cave. During Galungan, a torch-lit procession of women bearing offerings visits the underground lake.