Kassel itself is just a bland town with a ton of 1960s square concrete buildings. But this park is a gem! My sister made us go hiking here early in the morning, and it was probably the most memorable experience of my trip to Europe (which included first time visits to London, Paris, Venice, Rome and Florence.) It has fantastic fountains, gorgeous grounds, a hunting lodge, and of course, the Wilhelmshohe palace. You’ll get lost in the 19th century Baroque landscape design.