It is located on a dry hill near the Greek Public Power Company (DEH) power plant in the Milaki village of Euboea and near a cement factory.
From above there is almost a 360-degree view.
It was probably built in the early decades of the Frankish occupation of Euboea in the 13th century.
It is said that a 1.5 km tunnel connects the castle with Milaki.
The castle remained in use at least until the years of the Greek Revolution when it was a prison for the Turks.
The shape of the castle is a trapezoid measuring 46x30m with an area of 1200 square meters. In the center of the enclosure rises the central tower, almost square. Its dimensions: 7.10 x 7.60 meters. It is preserved to an approximate height of 11 meters.
Of the castle walls, the north and west sides are better preserved. The east wall is destroyed. On the south side, only a part in the west is in relatively good condition. The western wall extends approximately to a length of 42 m.
Outside the castle, to the south and to the west, there was a small fortified settlement consisting of small houses with dimensions of 4x4m or 4x5m, with adobe walls without mortar and with wooden roofs.