St. Martin Parish, home to the world's largest freshwater river basin, the Atchafalaya Basin, provides nearly every type of outdoor recreational activity imaginable. St. Martinville, the parish seat, is the third oldest town in Louisiana. The major crops in St. Martin Parish are sugarcane, soybeans and rice. St. Martin Parish includes the municipalities of Arnaudville, Breaux Bridge, Henderson, Parks and St. Martinville.