Trade Plantation Country for “Bayou Country” in Houma. Estimates indicate that southern Louisiana stewards nearly half of the wetlands located in the lower U.S., creating a landscape of cypress trees, wetlands and the alligators, turtles and hundreds of bird species they shelter. That makes Houma the place to tour the swamp—by airboat, canoe or even seaplane. Contrast that natural tranquility with Houma’s festival mentality, celebrating the cultures that have mingled here over the centuries. Houma’s authentic Cajun Mardi Gras (annually in February or March) is a perfect example.