Bergpark Wilhelmshöhe is a unique landscape park in Kassel, central Germany. The area of the park is 2.4 square kilometres (590 acres), making it the largest European hillside park, and second largest park on a mountain slope in the world. Construction of the Bergpark, or "mountain park", began in 1696 at the behest of the Landgraves of Hesse-Kassel and took about 150 years.
Reservoirs and channels behind the Hercules Monument supply water to a complex system of hydro-pneumatic devices that supply the site’s large Baroque water theatre, grotto, fountains and 350-metre long Grand Cascade.
For a tag, danke Claus :)