In Mrówki near Wilczyn, you can see the Archaeological Open-Air Museum located in the place of a cone-shaped stronghold from the 13th and 14th centuries. The main building of the castle is a reconstructed tower located on a conical mound surrounded by a moat. In addition, the palisade was reconstructed and the entrance gate and the bridge over the moat were built. On the two floors of the tower there is a small medieval exposition, and the highest floor serves as a viewing platform.