Like the index cards in a librarian's catalog, gravestones rarely sit in alphabetical order and cannot be reshuffled without causing an outrage. Explore cemetery mysteries with today's Groupon: for $15, you get two tickets to the Cemetery & Voodoo walking tour from New Orleans Spirit Tours (up to a $32 value). Tours depart at 10:30 a.m. daily and 1:15 p.m. Monday–Saturday.

Throughout the two-hour Cemetery & Voodoo walking tour, New Orleans Spirit Tours' resident guides lead sightseers on a narrated journey through one of New Orleans' oldest cemeteries before exploring voodoo's roots in the city's French Quarter. Daily tours tiptoe past the eerie architecture in St. Louis Cemetery #1, sneaking peeks at unconventional burial methods still in use, decaying monuments just barely shielding earthly remains, and gravestones with inscriptions written in binary. From there, groups traverse the path to the voodoo spiritual temple as guides delve into the African origins and Catholic influences that comprise voodoo's long history. While inside the authentic voodoo temple, patrons absorb tales of New Orleans' enigmatic characters and relics, such as voodoo queen Marie Laveau or her haunted drying machine, whose lint trap was said to moan with rage. The two-hour walk sends tingles running up and down spines as tours explore the city's eeriest locales.