Bromo - Tengger - Semeru National Park is area of conservation in Indonesia which has a unique form of sand sea covering an area of over 5,000 acres and with the high 2.110 meters above sea level. In the sea of sand found seven eruptive centres in the two paths that cross each other from the east to west and northeast to southwest. From the northeast to southwest of Mount Bromo was raging, including active volcanoes and from time to time to issue an eruption of smoke, but it gives human life in the vicinity of more than 3.550 people. Mount Bromo has a crater with a diameter of 800 meters from north to south and 600 meters from east to west. While the danger prone area of a circle with a radius of 4 kilometres from the centre of crater. Tengger tribe who live around the park which is a tribal Hindu. According to a local belief, the origin comes from the Tengger tribe kingdom of Majapahit into exile. Local residents are familiar with their lives and looked no fear despite knowing that it is dangerous mount Bromo, as well as many of the tourists who visit the Bromo Tengger Semeru National Park ceremony of Kasodo time. Mount Bromo is one of the best spot to watch the beautiful sunrise. To get there, must start at least at 03.30 am by jeep transport to reach mount Pananjakan first which is higher then mount Bromo, see the sunrise and then get good shot of that mountain and surround from the top. Jacket is necessary to wear caused it cold up there. The best time to visit mount Bromo in betwen May up to October.