The Angioina Tower was built during the reign of Giovanna I d'Angio' probably on a Norman preesitente plant. E'a circular plant, of strong mass, high 25 meters. The boundaries introduce to crown, in high, a series of beccatelli and battlements. It dominates on the valley of the S.Maria valley and the valley of the Fortore. We don't know the precise year in which such work was realized, but, since Giovanna I reigned from 1343 to 1382, the year of its edification is to make to go back around to 1369.

It represents the largest karst spring in Montenegro. They used to be called Vrulja, then Vrela, and after that Sava's springs, after Saint Sava, and Gusinjski springs. They are currently named Ali Pasha's springs, after Ali Pasha Gusinjski, a famous historical figure from the 19th century.

The archaeological park of Siponto, consisting of the two basilicas, make visitors aware of the important historical role played by this area, which is today enhanced by the creative power of the fantastic installation by Edoardo Tresoldi.