Nusa Penida is a small island located in the southern part of Bali precisely in Kelungkung regency. The small island consists of 3 main islands namely Nusa Gede, Nusa Ceningan and Nusa Lembongan.Nusa Penida always has stories and amazing places. Its natural beauty always makes people curious to visit there. You must have heard of an underground house. In Nusa Penida there is one of the prehistoric relics of the underground house that is often called Gala-Gala Cave, has a depth of 7 meters below the ground. Back in 1961, a man named Jero Mangku Dalang or often called Mangku Byasa built an underground house. He is a farmer and a hermit. The place was used for his hermitage. In the past, the process of constructing an underground house was very unique and traditional, using only a linggis (sharp iron), then using cow dung that was burned to soften limestone so it was easy to dig and took 11 years to complete it. Gala- Gala Cave The Gala-Gala Cave is located in Lembongan V