Gunung Sewu (Thousand mountains)[1] is the name for thekarst region of southern centralJava that lies to the south east ofYogyakarta, south ofSurakarta, and is considered a very dry and poor socio-economical region in Java. It has poor rainfall compared to the volcanic mountain areas to the north and east. Administratively most of the region is part ofGunung Kidul Regency, within theYogyakarta province besidesWonogiri Regency andPacitan Regency. In 1993, the worldspeleologs proposed Sewu Mountains Karst Area as a world heritage. And on December 6, 2004 Sewu Mountains and South Gombong have been announced as eco-karst.[2]
It is a region where archaeological evidence shows very early human activity[3]
It is very popular with cavers.[4][5] There are 119 caves below of about 40,000 karst cone hills in 13,000 square kilometer area.[2] The onlycave-adapted crab from Java,Sesarmoides jacobsoni (Sesarmidae), isendemic to the Gunung Sewu cave system.
On September 19, 2015 UNESCO announced Gunung Sewu area as Global Geopark Network followsMount Batur area. Gunung Sewu area lays 85 kilometers in 3 provinces,Yogyakarta Province,Central Java Province andEast Java Province. The longest cave found at Gunung Sewu area is 25 kilometers Luweng Jaran and the deepest is 200 meters Luweng Ngepoh.[6]
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