The castle of Grienericksee is linked to Frederick the Great, who lived there for four years. In 1834, the castle was bought by Friedrich-Wilhelm I for his son, who had it transformed into the Baroque style. The central building is the work of Knobelsdorff. Inside, see the Hall of Mirrors and the Cabinet of Bacchus, both decorated with frescoes by Pesne. The castle houses the Kurt Tucholsky memorial. Also be sure to tour the grounds, landscaped according to plans by Knobelsdorff and JS Sello and Frederick's own tastes.