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
Millau country to the rigors of continental climate. Millau is a sub-prefecture of the Aveyron department in the Occitanie region. The Community of Communes of Millau Grands Causses was created on June 22, 1989 with Aguessac, Compeyre Creissels Millau Paulhe. Today the community has 14 towns with Comprégnac, Saint-Georges-de-Luzençon La Roque-Sainte-Marguerite, Saint-André-de-Vézines, Mostuéjouls, Peyreleau, Rivière-sur-Tarn and Veyreau. The education establishments in the town of Millau report to the Academy of Toulouse. The Public school is the "College Marcel Aymard", a technological and professional General School. The Private school is the "College and Lycée Jeanne d'Arc". Vocational education can be found at