Giebichenstein Castle consists of the lower castle, which was built between 1445 and 1464, and the upper castle. The oldest remains of the wall of the Oberburg date from around 1154. Great view over the Saale.
It's actually a ruined castle. Nevertheless, because of the magnificent view of the Saale valley and the city of Halle, it is worth the climb (and entry € 8 / adult 2020). The view from the tower is even better.