Volcanoes

Hiking and camping  in the mountains are popular adventure activities. Some mountains contain ridge rivers, offering rafting activity. Though volcanic mountains can be dangerous, they have become major tourist destinations. Popular active volcanoes are the 2,329-metre (7,641 ft) high Mount Bromo in the East Java province with its little desert, the upturned boat shaped Tangkuban Perahu on the outskirts of Bandung, the most active volcano in Java, Mount Merapi and the legendary Krakatau with its new caldera known as anak krakatau (the child of Krakatau). Puncak Jaya in the Lorentz National Park, the highest mountain in Indonesia and the only mountain with ice caps, offers the opportunity of rock climbing. In Sumatra, there are the remains of a supervolcano  eruption that have created the landscape of Lake Toba close to Medan in North Sumatra.