Millau's biggest draw stands a few kilometres downstream from the town centre: the Millau Viaduct, the world's tallest bridge and a Norman Foster design that looks like a row of yacht masts strung across the valley. It is best appreciated from below — there is a dedicated viewing area at Aire du Viaduc on the A75 with information panels and walking paths, and the road bridges in the valley give angles you cannot get from the highway.
The town itself rewards a slow afternoon. The old centre clusters around the Place du Maréchal Foch, with its arcaded square and bell tower, and the medieval bridge over the Tarn. The Musée de Millau, housed in the eighteenth-century Hôtel de Pégayrolles, covers the town's two great trades: leather glove making and the Roman pottery industry at La Graufesenque, whose red-slip Samian ware was exported across the empire.
Outside the town, the limestone causses begin. The Causse Méjean and the Causse Noir are vast empty plateaus cut by deep gorges; the Gorges du Tarn and Gorges de la Jonte are spectacular drives or canoe routes. The Chaos de Montpellier-le-Vieux, a ruined-city landscape of weathered dolomite, lies twenty kilometres east. Roquefort-sur-Soulzon, where the famous blue cheese is aged in natural limestone caves, is half an hour to the south and well worth the detour.