Visit this fortress works dating from the time of the town foundation (sluice bridges, Vauban island, bastion VI), from the time of the Prussian period (barracks and blockhouse) and go through the new redesigned area called Ravelin V, when the old flood of the fortified town occurred.
The fortifications are freely accessible on foot all year long. Other information and a tourguide are available at the tourist information office at the townhall.
(d/f/engl.): Tourist-Information im Rathaus: firstname.lastname@example.org