Archaeological Sites Along the Danube and limes there are more than 80 registered roman sites: Belgrade (Singidunum) Ritopek (Castra Tricornia) Dubravica (Margum) Stari Kostolac (Viminacium) Ram (Lederata) Iron Gate gorge Porečka reka Hajdučka vodenica Tabula Traiana – Trajanova tabla Karataš (Diana / Statio Cataractarum Dianae) Kostol (Pontes)