1) Dema Wall. It is located 3km west of the center of Ano Liosia, in the saddle between Parnitha and Mount Egaleo, which was the widest passage from the west to the Athenian plain. The name Dema is newer and means link (bundle) of Egaleo with Parnitha.
2) A Circular tower-observatory is located at the top of the hill Pyrgarthi, 180m. east of the Dema wall.
3) "Back Wall". It is located about 225m. east of the Dema Wall and parallel to it.