Jomblang cave lies in Jetis village, Pacarejo, Semanu, Gunungkidul. Located is about 8 kilometres east of the town Wonosari and 50 kilometres southeast of Yogyakarta. Jomblang Cave is one of 400 caves in Gunungkidul. The cave is vertical distance of about 80 meters and connected with Grubug cave, which is at north part of Jomblang.
To do adventure in Jomblang Cave, requires ability to explore vertical cave technique using rope as path to go up and down vertically field. It has diameter of 50 meters and it was visited and explored by Speleological Club in 1984, group of cave explorers from Yogyakarta. According to the stories of local people, in 1970 the cave being used as mass murder Communist party members. The incident was made by local people fear in long time, so Jomblang cave was untouched by humans. In 1990, the local people made ceremony and prayed in the cave and no more scare to explore the cave
To reach the base of Jomblang cave is quite difficult and tiring, but it will pay off tired after going down into the hall about 500 meters towards Grubug cave. There is view of silhouettes awesome and some trees growing on the walls and overgrown shrubs.