Hradek u Usteka is another castle torso in this region. It is set on a limestone formation less than 4km from Ustek. It is also called Helfenburk. The castle is characteristic with its three-storey tower. Jan from Klinstejn is one of important personalities of this castle. He is responsible for the castle establishment and further architectural modifications. The three-storey tower was built by order of another castle owner Jan from Jenstejn.