Darmstadt-Dieburg District

Darmstadt-Dieburg District is a Kreis (district) in the south of Hesse, Germany. Neighboring districts are Offenbach, Aschaffenburg, Miltenberg, Odenwald, Bergstraße, Groß-Gerau, and the district-free city of Darmstadt, which it surrounds.

History
The district was created in 1975 by merging the previous districts of Darmstadt and Dieburg. In 1963 the district was twinned with the district of North East Derbyshire, England, in 1990 with the district Zwickauer Land in Saxony, Germany, and in 1995 with the Mladá Boleslav region in the Czech Republic.

Geography
The district is located in the Odenwald mountains. Most famous in the district is the Messel Pit, where many fossils in the oil shale of a Tertiary lake were found. The site is listed in the UNESCO world heritage list since 1995.