Ksiaz Castle is one of the largest castles in Poland, and is associated with the history of Princess Daisy von Pless and the Hochberg family. Wałbrzych's castle also holds many secrets from World War II, during which the building passed into the hands of the Third Reich and became Adolf Hitler's quarters. When going to Książ, you can plan a day tour or a night tour and go to the palm house in Walbrzych in one ticket. The castle provides beautiful royal interiors, a number of exhibitions, as well as underground hiking trails. The place is also well-known thanks to the Flower Festival, which is held there every May.