Mount Bromo, Gunung Bromo, is one of three volcanoes inside a larger caldera. Yes, volcanoes inside volcanoes. The whole Mt. Bromo experience normally involves seeing the sunrise from the viewpoint of Penanjakan overlooking the gigantic Tengger caldera (10 km across), which besides holding Mt Bromo (2,329 m), Mt Kursi (2581 m), and Mt Batok (2440 m) also has the Sea of Sand, a plain of volcanic ashes. From the viewpoint you descent into this lunar landscape (in jeep), for then ascent the smoking Mt Bromo on foot (or horse). You can walk on the rim and, if time, circuit the whole Mt. Bromo crater (1 h). Mt. Bromo is a major tourist attraction for both local and foreigners, so don't expect to get it to yourself. Most travellers go on an organised tour from Yogyakarta, but you can also do it yourself from Cemoro Lawang. For the true adventurer, there is a 3-4 day hike that can be done from the backside of the Bromo Tengger Semeru National Park. It is a wonderful hike and gives you a chance to see some wildlife.