Gumbo is a Louisiana Creole stew that's thick and spicy, usually containing shellfish and sausage and served over rice. When you're visiting New Orleans, you should definitely try some gumbo.
One of gumbo's traditional thickeners is the vegetable called okra, which is sometimes also called gumbo, from the Angolan word kingombo. The ingredients of an authentic gumbo can vary a lot, though it almost always starts with celery, onions, and peppers and flavorful stock. From there, it needs a thickener (either a roux or cooked okra), spices, and meat or shellfish. Gumbo is the official food of the state of Louisiana.