The village of Castin, north-west of Auch, would have been the site of an old castle now destroyed, in the part of the village called "Castelbieilh" which means "old castle" in Gascon. The viaduct, built in 1900, is one of the sites to discover in this village: made up of twelve arches and a length of 126 meters, it is a well-preserved vestige of the old Auch-railway line. Bazas built in 1903. The Saint-Genès church is also to be seen: it underwent several alterations during the 3th and XNUMXth centuries. You will enjoy walking around this village: it has gleaned its XNUMXrd flower (Label "Cities and Villages in bloom")!