rinjani4dThen you get to do one of the most popular and challenging treks in Indonesia. Towering at 12,224 feet on the island of Lombok, Mount Rinjani is one of the hhest volcanoes in Indonesia.In 1257, Mount Samalas, the precursor to Mount Rinjani, experienced a catastrophic eruption, one of the most powerful in recorded history. This caldera-forming event reshaped the landscape,