Located in the Gunung Kidul Regency of Yogyakarta, Jomblang Cave is a massive vertical collapse doline formed thousands of years ago. It has become one of Indonesia’s most iconic natural wonders, famous for its unique ecosystem and breathtaking lighting effects.
Key Highlights
The Vertical Descent: Unlike traditional horizontal caves, Jomblang requires a 60-meter rappelling descent (using Single Rope Technique) to reach the cave floor.
The Ancient Forest: At the bottom of the sinkhole lies a lush, prehistoric-style jungle. Because this area was isolated from the surface for centuries, the flora here differs significantly from the vegetation at the top.
Grubug Cave & The "Light of Heaven": A 300-meter tunnel connects Jomblang to Grubug Cave. Here, between 10:00 AM and 12:00 PM, sunlight streams through a hole in the roof, creating a magnificent pillar of light known as the "Ray of Light" or the Light of Heaven.
The Underground River: Visitors can hear and see a rushing underground river at the base of Grubug Cave, which eventually flows out to the Indian Ocean.
Note: Due to conservation efforts and safety regulations, daily visitors are strictly limited. It is highly recommended to book with a local Tour Operator in advance.