Tarn (river) a mean flow of approximately . The Millau Viaduct spans the valley of the Tarn near Millau, and is now one of the area's most popular attractions. The tributaries of the Tarn include: The Tarn separates the Narbonne and Aquitaine basins. The Tarn passes through the following departments and towns: The Millau Viaduct, the tallest bridge in the world, carrying the A75 autoroute across the Tarn Gorge near Millau, opened in December 2004. The Tarn is famous for its brutal floodings, which are the most dangerous in Europe along with the Danube. The flooding of March 1930 saw the Tarn
Aguessac D907 goes north-east from the village to Riviere-sur-Tarn and the D167 goes west by a tortuous mountain route to Saint-Germain. The famous Millau Viaduct (Viaduc de la Garrigue) is on the A75 autoroute immediately to the west of the commune. The commune is mixed forest and high country farmland. There are many streams flowing through the commune: the "Ruisseau de Malbose" forms the northern border of the commune, the "Lumansonesque" forms the eastern border flowing into the Tarn which forms the southern part of the eastern border. The Lumansonesque is fed by the "Barbade" with its numerous tributaries which forms