The Goa Lawah, meaning Bat Cave, is located in the Pura Goa Lawah temple complex and, as its name would suggest, is indeed inhabited by bats. They create an eery atmosphere and their high-pitched chirping can be heard as soon as you enter the temple!
Many different legends surround the Goa Lawah. Local legend claims it hides a river of healing waters and is home to a snake king that wears a crown and lives on the bats in the cave. It is also said to lead to the Mother Temple at the foot of Mount Agung as well as the villages of Talibeng and Tangkid Bangbang.
In the morning you can see locals gathering at the temple for their daily prayers and it is also visited by Hindu pilgrims.