The Garonne River carried wine barrels to England and the Netherlands for three centuries before a single vineyard branded itself as Bordeaux. Port de la Lune, the crescent-shaped harbor where the river bends through the city's eighteenth-century stone quays, shipped more wine than any European port by 1789. The river remains the axis of the wine trade: wooden barrels still age in cellars along Quai des Chartrons, and négociant warehouses face the water where flat-bottomed gabare boats once anchored. The châteaux upriver in Médoc, Pauillac, and Saint-Émilion relied on tidal currents to transport their harvests downstream, and the quays became the first point of sale. Today the Garonne defines Bordeaux's rhythm. The river rises and falls with Atlantic tides twice daily, exposing sandbars at low water and lapping against the Pont de Pierre's seventeen arches when the tide peaks. The Miroir d'Eau reflects the Place de la Bourse at the river's edge, and the Cité du Vin's golden tower overlooks the northern basin where the Garonne meets the Dordogne. River cruises trace the same route the wine fleet followed, passing under Jacques Chaban-Delmas Bridge, the city's vertical-lift span completed in 2013, and alongside the hangars that housed the colonial commodities trade. The UNESCO World Heritage perimeter follows the riverbank for five kilometers, encompassing the port's historic warehouses and the neoclassical facades that line the quays. A Bordeaux wine boat tour connects the liquid geography of the region with its architectural legacy. The river shaped the city's prosperity, and the city shaped the wine's identity. Tasting a glass of Bordeaux while drifting past Quai Richelieu or the Bassins à Flot clarifies why terroir extends beyond the vineyard: the river transported the wine, the port stored it, and the quays sold it to the world. The canelé, Bordeaux's fluted pastry flavored with rum and vanilla, emerged from the same maritime trade routes that carried barrels to foreign markets. River wine cruises pair the pastry with a pour of regional wine, anchoring the tasting in the geography that made Bordeaux synonymous with claret.