Mount Papandayan, a complex stratovolcano located in Garut Regency, to the southeast of the city of Bandung in West Java, Indonesia, is about fifteen kilometers to the southwest of the town of Garut.

At the summit, there are four large craters that contain active fumarole fields.

An eruption in 1772 causes the northeast flank to collapse producing a catastrophic debris avalanche that destroys forty villages and kills nearly three thousand people.

The eruption truncates the volcano into a broad shape with two peaks and a flat area one point one kilometers wide with Alun-Alun crater in the middle, making the mountain appear as a twin volcano; one of the peaks is called Papandayan and the other Mount Puntang.