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
Hacho Bridge Pia railway bridge in Oporto, Portugal. A site was chosen for the bridge between the Granadin cities of Guadahortuna and Alamedilla where the railway would cross the Guadahortuna River. Construction work began in 1893. Work was completed four years later. Hacho Bridge officially opened on March 22, 1898. Hacho Bridge is long with a maximum height of at its highest part. It is a continuous under-deck truss bridge that stands on nine wrought iron trestles and stone piers. The structure's design is based around a central double beam that runs the whole length of the single-track crossing. This is supported