Dieng Volcanic Complex, Volcanic complex in Central Java, Indonesia.

Dieng Volcanic Complex is a volcanic field on the Dieng Plateau in Central Java, Indonesia, covering about 6 by 14 km. It consists of two or more stratovolcanoes, more than 20 small craters, and Pleistocene to Holocene volcanic cones. The Prahu stratovolcano was truncated by a large Pleistocene caldera, later filled by parasitic cones, lava domes, and craters, some of which are now lakes.

The volcanic complex's recorded history is one of hazard and energy use. On 20 February 1979, toxic gas from Sinila Crater killed 149 people in Pekisaran village on the plateau. The same geothermal heat now feeds a major power project in the area.

The name Dieng derives from the Javanese Dihyang, meaning "abode of the gods", and the plateau is still treated as a sacred landscape. Visitors can see the small Hindu temples of the Dieng temple groups, dated to the 7th and 8th centuries, standing among the craters and lakes.

The site sits at high elevation, so visitors should bring warm clothing and allow time to adjust to the altitude. Exploring on foot is the best way to navigate the terrain, and sturdy shoes are essential due to volcanic rock and muddy paths.

The Sikidang Crater stands out as one of the most visibly active points, with gases continuously rising from the ground and permeating the air. This display reveals the raw power of volcanic forces still working beneath the surface.