It-Torri tal-Kaptan is at Triq it-Torri, Qrendi and is unique in Malta as it is octagonal in plan.

It was built in the late mediaeval period and consists of three stories with a square cordon between the ground and first floor and a rounded cordon between the second and third floor.

On each side at roof level are machicoulis or "drop boxes", set in a single or double width alternatively.

There is a window on each side of the north, south, east and west façades. The tower is surrounded by an array of earlier, contemporary and later buildings and courtyards forming one of the most interesting examples of architectural development in these islands.

The tower's main entrance is located within the adjoining residence which was originally a mediaeval mill room or chapel with a courtyard which might have served as a parvis or cemetery. The date 1605 is inscribed above one of the room's doorway. The property includes a Second World War shelter.

Mepa scheduled It-Torri tal-Kaptan as a Grade 1 national monument and the adjacent property of which it forms part as a Grade 2 complex of architectural and historical importance as per Government Notice no. 628/08 in the Government Gazette dated July 12, 2008.