Schloss Wilhelmshöhe is a grand palace located in the northern part of Kassel, Germany. It was built between 1786 and 1798 by the Landgrave of Hesse-Kassel, Wilhelm IX, who wanted a grandiose palace that would reflect his own grandeur and that of his dynasty.

The palace is situated in the middle of the Wilhelmshöhe Mountain Park, which is a UNESCO World Heritage Site. The park is over 240 hectares and includes a variety of gardens, a lake, a large fountain, and several other buildings and structures.

The Schloss Wilhelmshöhe palace is designed in a neoclassical style and has four floors. It includes a grand ballroom, a gallery, and several other opulent rooms that were used for state receptions and other official events. The palace also houses a museum with an extensive collection of paintings, sculptures, and other works of art from the 16th to the 19th century.

The most striking feature of the Schloss Wilhelmshöhe palace is the large water cascade that runs down the hillside behind it. This cascade is over 350 meters long and is made up of several pools and fountains, with water flowing from the top down to the lake at the bottom. The cascade is illuminated at night and is a popular attraction for visitors.