Questel Fort 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 and Fort Penfeld, and is also part of the same fortifications as Fort Montbarey.
The Fort du Questel monitors the valleys of the Moulin du Buis to prevent any enemies from becoming established and bombarding the city and harbor. Surrounded by deep moats and accessed by a drawbridge, it consists of a masonry wall, topped by a chemin de ronde, or covered path for musketeers. This path is itself dominated by an earthen rampart, angled to support artillery.
Wikipedia https://en.wikipedia.org/wiki/Questel_Fort
Address 29200, France
Coordinates 48°24'2.129" N -4°32'0.775" E