The rectangular hilltop called Ekklisoules or Palaiokastro is at an altitude of 932 m. Only the west-side approach is smooth enough and accessible, the remaining sides are sheer, making it a natural hill-fort. On the two prominences of the fortifications (some 400 sqm) is built a rectangular tower apiece. The tower on the west has dimensions of 7.8 x 4.6 m; its maximum preserved height is 2.75 m. The thickness of the walls is 0.75 m. On the south side an opening at some height above the ground-level corresponds to its entrance. To its west and outside is an opening that should be a cistern.
A few meters (22 m) to the east is the second tower, measuring some 7.3 x 4 m. It is best preserved on its north side, to a height of 2.7 m, while the thickness of the walls reaches in places 1.15 m. The entrance is located on the north side of the tower, some 2 m from the ground. Of interest are the preserved remains of the roof that testify to the existence of a vault, while the rectangular beam-holes would argue its wooden construction.
Both towers are built of local small grey field-stones, held together by a hard and coarse lime plaster/mortar intermixed with pieces of tiles and small stones. The cornerstones are worked and the building here is more careful. Use has been made too of ancient bricks, coming probably from the nearby location of Agia Kyriaki Karteroliou.
The wall runs round the hill-top; a few traces of it remain all the way round.
On the south-west slopes of the fort lie extensive ruins, called Chalasmata, which probably constitutes the Byzantine settlement that went with the fortification on the hill-top.