Wolfsschlucht I, Military headquarters in Brûly-de-Pesche, Belgium

Wolfsschlucht I is a former Führer headquarters near Brûly-de-Pesche, centred on a farmhouse with a preserved concrete bunker sunk three metres deep, built from 630 m³ of concrete and offering 25 m² of floor space. Five barracks with a total of 1,500 m² were erected, and village buildings including the school and church provided another 800 m². A small-aircraft landing strip lay south of the village.

Construction of Wolfsschlucht I began on 25 May 1940 under Organisation Todt, with 600 of its members working until 6 June. Hitler moved here from the Felsennest on 6 June and stayed only intermittently until 25 June, having ordered the transfer to Tannenberg on 19 June; the site was handed to Organisation Todt on 2 July 1940.

Two museum pavilions built on the site in 1992 cover the Battle of France and the actions of the Resistance. A reconstruction of a Resistance forest camp stands on the grounds, and Hitler's preserved bunker can be visited.

Wear sturdy shoes as the walking paths go through wooded terrain with some uneven ground. Guided tours in multiple languages are available and connect all the main locations of the complex.

Hitler never slept in the bunker built for him: the concrete shelter, sunk three metres deep and poured from 630 m³ of concrete, gave just 25 m² of floor space. Eyewitnesses reported that a plague of mosquitoes kept him outdoors for much of his stay in June 1940.