The Jomblang Cave is located near Pacarrejo village, in the Semanu region. It is one of more than 300 caves in this area with a depth of 80 m. In order to see the famous light, you must visit the cave no later than 10 am.
A professional crew will lower you down 60 m into the cave with rappelling equipment. Once in the cave, you will discover the tunnel connecting this cave with another cave named Grubug, which has a depth of 120 m. This is where you will see the divine light. The entire caving experience might take up to 8 hours.
The dry summer season from May to September is the best time to marvel at the heaven light inside the cave.