New Orleans' unique geography, built on swampland, has led to some of the most extraordinary cemeteries in the world. The city's above-ground burial practices have created these 'Cities of the Dead.' St. Louis No. 1, a short walk from the French Quarter, is the final resting place of the famed Voodoo Queen Marie Laveau. It's said that if you bring an offering to her grave and mark three Xs, she might grant your deepest wishes.