Sioule
The Sioule (; ) is a river in central France, a left tributary of the river Allier. Its source is near the village of Orcival, north of Mont-Dore, in the Massif Central. The Sioule has cut a deep gorge, especially in its upper course. The Sioule flows generally northeast through the following departments and towns: The Sioule flows into the river Allier at La Ferté-Hauterive, 10 km (6 mi) north of Saint-Pourçain-sur-Sioule. Its main tributaries are the Sioulet and the Bouble. The Fades viaduct, the tallest railway bridge in France, is located on the Sioule. Sioule