The crater is part of the Patuha volcanic complex, which also includes the better-known Kawah Putih crater.
The geothermal activity here results from water heated by the underground magma chamber of Mount Patuha.
The mud found in the crater is rich in sulfur, which is traditionally believed by locals to assist with skin health.
The site contains multiple 'kawah' or craters that continuously release steam, creating a landscape of white and yellow mineral deposits.
The water temperature in the pools varies significantly based on proximity to the primary volcanic vents.
Cibuni Rengganis Crater is an active geothermal field located in the Rancabali region of Bandung, West Java. The site features natural hot springs and mineral-rich mud baths fed by volcanic activity. Visitors navigate a series of pathways built over steaming vents and bubbling geothermal pools. The area is distinct for its sulfurous steam and high-temperature water surfacing directly from the volcanic terrain. It is situated in a high-altitude forest setting, contributing to a humid and misty microclimate. The site is structured to allow direct physical interaction with the geothermal mud and heated water sources.
The wooden suspension bridge that overlooks the main steaming vents and the vibrant white mineral deposits below.
Bring an extra set of dark-colored clothes as the sulfurous mud will likely stain your swimwear or garments.
Wear footwear with strong grip, as the terrain consists of damp soil, rocks, and wooden boardwalks that can become slippery.
Carry a plastic bag for wet, mud-covered items to protect your vehicle or backpack during the return trip.
Do not attempt to walk off the marked boardwalks into unverified mud pits, as ground temperatures can be dangerously high.
Avoid wearing jewelry or precious metals, as the sulfuric fumes can cause rapid tarnishing and corrosion.
