Angel's Billabong is a natural wonder carved by centuries of wave action along the dramatic southern cliffs of Nusa Penida. At low tide, the ocean recedes to reveal a series of crystal-clear rock pools, the largest of which creates the illusion of a natural infinity pool — its turquoise water appearing to merge seamlessly with the horizon beyond. The clarity of the water is extraordinary: the white limestone basin and the absence of sand give the pool a luminous, almost otherworldly blue-green colour that photographs most strikingly in the golden hour around sunrise. At this time, the light catches the water's surface and the surrounding cliffs glow amber, making Angel's Billabong one of the most visually striking locations on the island. Safety is critical here. When the tide rises or swell increases, waves can wash across the pool entrance with no warning — several visitors have been swept into the open ocean in recent years. Always check the tide table before visiting, never enter when waves are washing the rocks, and heed local guides. The site is typically safe between two hours after high tide and two hours before the next high tide. Combine the visit with nearby Broken Beach (Pasih Uug), a five-minute walk along the cliff path.