Next to the Old National Road Athens - Thebes, at the height of the modern settlement of Oinoi (Mazi), the northwestern corner of an ancient quadrilateral tower is preserved. It is maintained at a height of 14m. and it is estimated that it had a total of four floors. Dates back to the 4th c. BC. The Tower, which had a supervisory and defensive character, should be associated with the ancient road Athens - Eleusis - Thebes, as well as with other monuments of the respective period that exist in the area, such as the Ancient Fortress of Oinoi, Eleftherai and Panaktos, as well as with the ancient circular tower on the hill Velatouri.