The belief is that one must break off a piece of brick from another tomb, spin around three times, scrape three X's onto the tomb, and do some sort of knocking on the tomb. Then an offering should be left at the tomb and your wish will be granted. X's that are circled are said to mean that the wish had come true.
Depending on where you are (or “where y'at,” rather) and what time of year it is, New Orleans might smell like horse manure, cigarettes, urine, dead fish, marijuana, vomit, diesel fumes, fried chicken, Confederate jasmine, old wood, coffee, Angel's Trumpet flowers, mown grass, mossy trees, and sweet olive.