Mount Merapi (Gunung Merapi) is the most active volcano in the world, the meaning of the name is fire. This mountain located on the border between Central Java and Daerah Istimewa Yogyakarta. It has erupted regularly since 1548.

Although smoke can be seen emerging from the mountain top at least 300 days a year, several eruptions have caused fatalities. Hot gas from a large explosion killed 43 people in 1994, mostly in the town of Muntilan, west of the volcano.

Another large eruption occurred in 2006, shortly before the Yogyakarta Earthquake. In light of the hazards that Merapi poses to populated areas, it has been designated as one of the Decade Volcanos.

Around the mountain there are many interesting places. Kali Kuning and Kaliurang is one of the most places that visited by many people from Indonesia, but if the mountain cough and smoke come out from the peak of the mountain, this places will be closed.