Bromo Tengger Semeru National Park is a national park in East Java, Indonesia, which is situated in the administrative region of Pasuruan, Malang, Lumajang and Probolinggo. The park is west-eastern stretch of about 20-30 kilometers and a north-south about 40 km is established since 1982 with a total area of about 50276.3 ha. In this area there is a sea of sand which covers the caldera ± 6290 ha. Limit caldera sea of sand in the form of steep walls, the height between 200-700 meters. And in this area, we can see the famous mountains, like Batok Mountain, Bromo Mountain and Semeru Mountain.