It stands on a low promontory over a set of fishponds whose dams were broken in times of danger, cleverly changing it into a moated castle.

It allegedly got its name from the fact that its walls are as hard as bone (kost means “bone” in Czech) and not even the Hussite general Jan Žižka was able to capture the castle. During the tour, you will learn about the owners, the Kinský family, or get to know the medieval torture chamber. The executioner Herman or Count Octavian will be your guide on your trip through the mysteries of the castle.