When you think of New Orleans, you probably picture jazz, beignets, and Mardi Gras. But the city hides a trove of ten most obscure facts that most visitors never hear about. From engineering marvels to criminal legends, these tidbits reveal a side of the Crescent City that’s as quirky as it is fascinating.
Ten Most Obscure Facts Unveiled
10 The Longest Continuous Bridge in the World
The Lake Pontchartrain Causeway stretches an astonishing 23.86 miles (38.4 kilometers) across the lake, earning a Guinness World Record as the longest continuous bridge on the planet. Although the bridge’s southern gateway lands in Metairie—a neighboring town—it’s still considered part of the greater New Orleans metropolitan area, linking the city to its northern shore.
Completed in 1956, the causeway is so immense that drivers sometimes admit to feeling a chill of dread when the lights fade in the middle, leaving the horizon invisible. On a few eerie occasions, expectant mothers on their way to a hospital have actually delivered babies on the span because they couldn’t reach the other side in time. For anyone cruising into the city by car, the causeway offers a fleeting glimpse of the New Orleans skyline—a breathtaking welcome for tourists and home‑bound travelers alike.
9 Longest Continuously Used Cathedral in the U.S.
Perched on the northern edge of the French Quarter, the white‑clad, triple‑steepled St. Louis Cathedral has held weekly Mass without interruption since 1794. Situated opposite the bronze statue of Andrew Jackson and a manicured garden, the cathedral welcomes thousands of worshippers and sightseers each day. In the hierarchy of Christian buildings, a cathedral is larger than a church and overseen by a bishop, distinguishing it from chapels and basilicas.
While San Miguel Chapel in Santa Fe, New Mexico, dates back to around 1610 and claims the title of the nation’s oldest church, St. Louis Cathedral holds the record for the longest‑used cathedral. Legendary Voodoo queen Marie Laveau is said to have attended Mass there throughout her entire life.
8 Poker and Craps Were Invented in New Orleans
The French game Poque, which emerged in the 17th century, is the direct ancestor of modern poker. French settlers introduced Poque to the Crescent City in the 1700s, and English‑speaking colonists later Anglicized the name to “poker” while tweaking the rules to create the version we know today. The dice game craps, meanwhile, traces its name to the French word “crapaud,” meaning frog.
Wealthy plantation owner Bernard de Marigny studied in France, where he learned a dice game called Hazards. Upon returning to New Orleans, he threw the dice in a crouched, frog‑like stance that earned him the nickname “Crapaud.” Friends began calling the game “craps” in homage to his amphibian posture, and the name stuck as the game evolved into the popular casino staple.
7 Bourbon Street Is Not Named for Whiskey
Despite the street’s reputation as a party thoroughfare where bourbon flows freely, Bourbon Street actually honors the European Bourbon royal family. The name dates back to the early settlement of the area—then called Bulbancha—in 1718, and was formally designated by French engineer Adrien de Pauger in 1721 as “Rue Bourbon.”
The House of Bourbon ruled France as absolute monarchs from 1589 to 1792 and again from 1814 to 1848, with a brief interruption during the Revolution and Napoleon’s empire. The family’s name is pronounced with the stress on the second syllable, a nuance many visitors miss while assuming the street celebrates the spirit.
6 A Pirate Won the Battle of New Orleans
In the early 1800s, brothers Jean and Pierre Lafitte ran a thriving black‑market empire out of New Orleans, complete with a private pirate fleet based on the island of Barataria, roughly 25 miles (40 km) south of the city. When the War of 1812 erupted, General Andrew Jackson needed every capable fighter to defend New Orleans from the British.
American forces raided Barataria, seized Lafitte’s ships, and arrested the brothers. Jean Lafitte escaped, negotiated a deal, and agreed to lend his seasoned men to the U.S. army in exchange for pardons and letters of safe conduct. The pirate‑turned‑soldier helped the Americans win the battle, suffering only about 5 % of the British casualties, and secured his place as a local folk hero.
5 Home of the Only U.S. Mint to Produce Two Types of Currency
The New Orleans Mint, a branch of the United States Mint, operated from 1838‑1861 and again from 1879‑1909. While it normally struck American coinage, the mint briefly produced Confederate money during the early months of 1861—a unique distinction no other U.S. mint ever shares.
After its decommissioning, the building served as an assay office, a United States Coast Guard storage facility, and even a fallout shelter. In 1981 it became part of the Louisiana State Museum, now housing two separate museums: one devoted to the history of U.S. minting and the other celebrating New Orleans’ rich jazz heritage.
4 Home to America’s First Pharmacy
The nation’s inaugural pharmacy opened its doors on Chartres Street in the French Quarter. Dr. Louis Joseph Dufilho Jr., who earned the country’s first pharmacy license in 1816, launched the shop in 1823, providing essential medicines during epidemics of yellow and scarlet fever. He tended the establishment for 32 years before retiring and selling it to the young Dr. James Dupas.
Dupas ran the pharmacy until his death in 1867, which was later linked to syphilis complications. Dark rumors later surfaced that Dupas was a serial killer who kidnapped women, used chloroform to render them unconscious, and attempted experimental abortions, disposing of the victims under cover of night. Today, the building operates as a museum chronicling American pharmacy history and is rumored to be haunted.
3 The French Quarter Is Comprised Mainly of Spanish Architecture
In 1717, French explorer Jean Baptiste Le Moyne de Bienville arrived at the settlement then known as Bulbancha, laying out the original French Quarter using French building techniques. However, after France ceded Louisiana to Spain in 1763, Spanish influence reshaped the city’s appearance.
Two devastating fires in 1788 and 1794 destroyed most of the original French structures, which were built with straw and hay for insulation. The Spanish, now in control, rebuilt the area using their own architectural style—thick brick walls, wrought‑iron balconies, and courtyards—giving the French Quarter the distinctive look visitors associate with New Orleans today.
2 The Birthplace of the American Mafia
Although many associate organized crime with New York City, the first American branch of the Sicilian Mafia, known as La Cosa Nostra, took root in New Orleans as early as the 1860s—decades before it emerged in New York. The city’s bustling port and diverse immigrant population made it fertile ground for early mob activity.
New Orleans was actually the United States’ earliest hub for Italian immigrants, boasting one of the nation’s largest Italian communities until later waves shifted toward Baltimore and New York. This early concentration helped seed the criminal organizations that would later spread across the country.
1 Birthplace of Dental Floss
While ancient peoples used primitive tools like twigs to clean their teeth, modern dental floss was invented in New Orleans. In 1815, local dentist Dr. Levi Spear Parmly experimented with wax‑coated silk thread, advocating that people run a “waxen silk thread through the interstices of the teeth” for optimal oral hygiene.
It wasn’t until 1882 that the Codman and Shurtleft Company began mass‑producing unwaxed silk floss, and in 1898 the Johnson & Johnson office in New Jersey secured the first patent for floss made from silk—the same material surgeons used for sutures. Parmly’s early work laid the foundation for today’s flossing routines.