The Dacian Fortress Costești-Cetățuie.

It is located on the "Cetățuia" hill, in the village of Costești, commune Orăștioara de Sus and it is also included on the list of the UNESCO World Cultural Heritage. The fortress is located at an altitude of 561 m, the hill slopes being worked into several terraces.  The fortification is made of an earth wall with a palisade, which was meant to protect the upper area of the hill, the plateau and part of the terraces. Towards the South-East, the fortification was doubled by a massif wall, with three towers, the “ground floor” being built of limestone blocks, with small abutments on the South side and making a sharp turn on the East side. On the plateau, there are traces of two habitation-towers, one in the North side and one in the South.  A monumental, 3m wide staircase made of carved stone, lead to one of these towers. The sanctuaries of the fortress were discovered on the terraces around the plateau; they consisted of rows of limestone discs, similar to those of Gradistea Muncelului - Sarmizegetusa Regia; the fortress was destroyed during the war of 102 B.C., it was rebuilt, but definitively abandoned in 106 B.C.