The Citadel of Huy — also called the Fort of Huy — sits on a bluff above the old town with commanding views over the Meuse valley. The current fortifications date from the early 19th century, built by the Dutch during their period of control over the region, though a series of earlier forts and castles had occupied the same strategic position since medieval times. A cable car (télépherique) runs up from the town in summer, or you can walk up on foot.
The fort houses a museum on the Nazi occupation and the camp that operated here during the Second World War, which gives the place a weight that outlasts the views. The ramparts themselves are worth the visit for the panorama over the Meuse and the rooftops of the lower town. It is an atmospheric site year-round, but especially striking in autumn when the wooded hillside below turns colour.