A swamp tour into the vast Atchafalaya Basin near Lafayette is one of the essential experiences of Cajun country, gliding by boat through a mysterious watery world of cypress trees draped in Spanish moss, home to alligators, herons, turtles and abundant wildlife. Local guides share the ecology, history and Cajun culture of the wetlands. The largest river swamp in the United States, the Atchafalaya offers an unforgettable journey into the wild heart of Louisiana.