Questel Fort (Fort du Questel) is a redoubt in Brest. It is a fortified structure of the Vauban type. It forms a closed square, with the main entry point placed on the least exposed side. This large quadrangle, 100 meters wide, is located between Fort Keranroux (1.5 km south) and Fort Penfeld (1 km to the North-east), and is also part of the same fortifications as Fort Montbarey. Onsite, the fortress offers walks through its sheltered green moat and its underground galleries, staircases, scarps and counterscarps, esplanade and fresh greenery nearby.