Authion
The Authion is a long river in western France located in the departments of Indre-et-Loire and Maine-et-Loire. It is a tributary of the river Loire on the right side. It flows into the Loire in Sainte-Gemmes-sur-Loire, near Angers. Its longest tributaries are the Lathan and the Couasnon. The largest towns on the Authion are Bourgueil, Mazé-Milon, Brain-sur-l'Authion, Trélazé and Les Ponts-de-Cé. Its basin area is.