Mengli Castle, positioned strategically on Mengel Hill within the Godolesh massif's southern region, commands the Shkumbin River valley, facilitating control over the Egnatia road. Its polygonal structure, fortified by a robust encircling wall crafted from medium-sized stones, varies in thickness but effectively secures the entrance and offers clear surveillance of neighboring fortifications. The entrance, flanked by two quadrangular towers, features a 3.5-meter-wide double-leaf gate.
Eight towers, strategically placed, ensure continuous defense, with a distinctive U-shaped tower adding complexity. Erected during Emperor Justinian's reign, Mengli Castle exemplifies 6th-century Byzantine military architecture, akin to Qafa Castle, aimed at safeguarding the southern Byzantine empire branch and controlling vital trade routes.