Dinant is a city in Belgium’s Walloon Region. It’s on the banks of the Meuse River and backed by steep cliffs. Perched on an outcrop above town is the centuries-old fortified Citadel. It’s now a museum with sweeping views. Below it is the Gothic Collegiate Church of Our Lady. Nearby, on the site of saxophone inventor Adolphe Sax’s birthplace, Mr. Sax’s House has interactive exhibits on the instrument’s development.