Wayang-Windu is a twin volcano that consists of Mount Wayang (Indonesian

Indonesian language

Indonesian is the official language of Indonesia. Indonesian is a normative form of the Riau Islands dialect of Malay, an Austronesian language which has been used as a lingua franca in the Indonesian archipelago for centuries....

: Gunung Wayang, "Mount Shadow") and Mount Windu. They are located just to the east of the town of Pangalengan

Pangalengan

Pangalengan is a Subdistrict in the Bandung Regency, Indonesia. It is located south of the major West Java city of Bandung.Main industries of the Pangalengan district include dairy farming and tourism, the latter arising from the popularity of the many traditional villages and natural attractions...

 in the Bandung Regency

Bandung Regency

Bandung Regency is an administrative district located to the south, southeast and east of the city of Bandung. Parts of the Bandung Regency are effectively part of the Bandung Metropolitan Area. The Regency is part of the Indonesian province of West Java, about 75 miles south of Jakarta...

 (Kabupaten or District) in West Java

West Java

West Java , with a population of over 43 million, is the most populous and most densely populated province of Indonesia. Located on the island of Java, it is slightly smaller in area than densely populated Taiwan, but with nearly double the population...

, Indonesia

Indonesia

Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania. Indonesia is an archipelago comprising approximately 13,000 islands. It has 33 provinces with over 238 million people, and is the world's fourth most populous country. Indonesia is a republic, with an...

, about 40 km south of the city of Bandung

Bandung

Bandung is the capital of West Java province in Indonesia, and the country's third largest city, and 2nd largest metropolitan area in Indonesia, with a population of 7.4 million in 2007. Located 768 metres above sea level, approximately 140 km southeast of Jakarta, Bandung has cooler...

. The area has been an active geothermal project. Mount Wayang has a 750 m wide crescentic crater

Volcanic crater

A volcanic crater is a circular depression in the ground caused by volcanic activity. It is typically a basin, circular in form within which occurs a vent from which magma erupts as gases, lava, and ejecta. A crater can be of large dimensions, and sometimes of great depth...

 which holds four groups of fumarole

Fumarole

A fumarole is an opening in a planet's crust, often in the neighborhood of volcanoes, which emits steam and gases such as carbon dioxide, sulfur dioxide, hydrochloric acid, and hydrogen sulfide. The steam is created when superheated water turns to steam as its pressure drops when it emerges from...

s. Mount Windu has a 350 m wide crater.