Kawah Sikidang is a volcanic crater with steaming vents and frantically bubbling mud ponds. Exercise extreme caution here – there are no guard rails to keep you from slipping off the sometimes muddy trails into the scalding-hot waters. At research time, however, they were building a brick path to make it easier to delineate the safe zone. Kawah Sibentang is a less spectacular crater nearby, and Telaga Lumut is another small lake.
