The trek up Mt Rinjani is not to be taken lightly; it’s the third highest mountain in Indonesia standing at around 4,000 meters and takes a full day to reach the rim of the Crater Lake just below the summit. Lenticular clouds hang over Rinjani, shaped as a flying saucer they form in really high wind speeds above peaks and create a spectacular drape on the mean volcano. Mount Rinjani was created from a volcano, the crater being filled by a lake which has bred it’s own mini baby volcano, only 10 years old.
You can either descend deep into the heart of the crater, or climb to the mountain’s summit. In the sulphur mud pools exist the earth’s first organisms-bacteria that produce carbon dioxide. The mountains are populated with packs of apes so climber should be cautious.