The Giklos fortress is built on an important strategic position on the Arachneo mountain, on an altitude of 870 meters. It oversees the passing from Corinth to Argolis.
A wide range of ruins sit on the area, some built during ancient times, others during the Byzantine rule, yet others during the Venetian, the Frankish, and more. The castle itself was built in the 13th century by the Franks, possibly under the rule of Othon de la Roche. The castle's south and east sides are protected by tall cliffs, and a wall of 1.80 meters thickness protects its north and west. Ruins of the wall and the castle are still discernible today.
Access is relatively hard, but entrance is free.