Walking tours explore intriguing surroundings at a leisurely pace, much like a photography class held in a thick bog of quicksand. Let it all sink in with this Groupon. Choose Between Two Options $18 for a True Crime tour for two (up to a $40 value) $29 for a True Crime tour for four (up to an $80 value) Ninety-minute True Crime tours explore the seedy underbelly of the French Quarter, which, from 1800 to 1950, played host to some of New Orleans' most gruesome crimes. Groups hear about the exploits of the Axemanâ€”the Big Easy's most notorious serial killerâ€”and visit the spot where a police chief was gunned down by Mafia hoods. Tours start at Flanagan's Pub. Though French Quarter Phantoms sometimes features a discounted price online, this Groupon still offers the best deal available.