Cubzac-les-Ponts, also referred to as Cubzac, is a commune of the Gironde department in Nouvelle-Aquitaine, a region in southwestern France. Located 20 km southwest of Bordeaux, it is a crossing point of the river Dordogne. Cubzac has three bridges, one designed by Gustave Eiffel. Cubzac is located about 20 km northeast of Bordeaux, on the north riverbank of the Dordogne. Several transport networks converge in Cubzac to cross the river. These include the A10 motorway, the N10 trunk road and the Bordeaux-Nantes railroad. The LGV Sud-Ouest, a high-speed railway line running between Tours and Bordeaux, is in the process of being build. Cubzac has an elevation ranging from 1 m to 42 m, the highest points being limestone cliffs dating from the Oligocene epoch, some of which have been used as source of stone.In oenological terms, Cubzac is near the appellations d'origine contrôlée côtes de Bourg and Fronsac, with its own wine castles.