Chicago has a reputation for deep-dish pizza, brutal winters, and a skyline that seems to touch the clouds. But beneath the postcard image of the Windy City lies a history full of strange inventions, forgotten scandals, and traditions that most people, even the ones who grew up there, have never heard of. From the origin of the world’s first skyscraper to a river that flows backward, Chicago has shaped American life in ways that rarely make it into the tourist brochures.
That’s what makes this city so much fun to dig into. Every neighborhood, every bridge, and every old building seems to hide a story that got lost somewhere between the Great Fire and today’s deep dish debates. Here are 15 facts about Chicago that might surprise even the most devoted locals.
1. The Chicago River Flows Backward
In 1900, engineers reversed the flow of the Chicago River, sending its water away from Lake Michigan instead of into it. The project aimed to stop sewage from contaminating the city’s drinking water supply.
2. The First Skyscraper Was Built Here
The Home Insurance Building, completed in 1885, is credited as the world’s first skyscraper. Standing at just 10 stories, it doesn’t look like much by today’s standards, but its steel-frame construction changed how buildings were designed forever.
3. Chicago Invented the Twinkie
The beloved snack cake was created in 1930 by a baker named James Dewar, who worked at a Continental Baking Company plant just outside Chicago.
4. The City Was Rebuilt on Jacks
After years of flooding and sewage problems in the 1850s, engineers physically raised entire buildings, sometimes whole city blocks, using thousands of jackscrews. Business continued inside the buildings while workers slowly lifted them several feet higher.
5. Chicago Has Its Own Language for Pop
While much of the country argues over “soda” versus “pop,” Chicago locals are firmly team pop. The linguistic divide is so strong that it’s become a running joke among Midwesterners and a small point of local pride.
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6. The Great Chicago Fire Might Not Have Started With a Cow
Generations of schoolkids learned that Mrs. O’Leary’s cow kicked over a lantern and started the fire of 1871. Historians now believe this story was likely invented by a newspaper reporter looking for a colorful angle, and the real cause remains unknown.
7. Chicago Gave the World the Ferris Wheel
The original Ferris wheel debuted at the 1893 World’s Columbian Exposition in Chicago. Designed by George Ferris, it stood 264 feet tall and could carry over 2,000 passengers at once, making it the tallest attraction at the fair.
8. The City Has More Miles of River Than Venice
Chicago’s extensive canal and river system actually covers more mileage than the famous canals of Venice, Italy. Few visitors realize just how much of the city’s history and infrastructure was built around its waterways.
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9. Chicago’s Flag Has a Secret Meaning
The four red stars on Chicago’s flag each represent a specific historical event: Fort Dearborn, the Great Chicago Fire, the World’s Columbian Exposition, and the Century of Progress Exposition. Locals take the flag seriously, and its design shows up everywhere from tattoos to city merchandise.
10. Al Capone’s Chicago Empire Was Built on More Than Booze
While most people know Capone for bootlegging during Prohibition, his operation also controlled laundromats, dry cleaners, and other everyday businesses. At its peak, his organization brought in an estimated $100 million a year.
11. The Sears Tower Once Held the World Record
Completed in 1973, the Sears Tower (now Willis Tower) held the title of the world’s tallest building for nearly 25 years.
12. Chicago’s Deep Dish Pizza Was Born From a Debate
The origins of deep dish pizza are still disputed among locals, with credit usually given to Pizzeria Uno in 1943. Some historians argue the dish evolved from earlier Italian immigrant recipes, making the true inventor a mystery even within the city itself.
13. The City Hosted the First Televised Presidential Debate
In 1960, Chicago’s CBS studios hosted the famous Kennedy-Nixon debate, the first presidential debate ever broadcast on television.
14. Chicago’s Underground Pedway System Spans Nearly Five Miles
Beneath the busy streets of downtown Chicago lies a hidden network of tunnels connecting buildings, shops, and train stations.
15. The City’s Nickname Has Nothing to Do With Weather
Contrary to popular belief, “The Windy City” nickname likely didn’t originate from Chicago’s winds. Many historians trace it back to 19th-century journalists mocking the city’s politicians for being “windbags” during the attempt to host the World’s Fair.
Want to know more about America´s most famous cities?
14 Fun Facts about Los Angeles digs into the hidden tunnels and Hollywood myths behind the City of Angels. If music is your thing, 15 Best U.S. Cities for Music Lovers takes you from Nashville’s honky-tonks to the birthplace of Motown in Detroit. And for a deeper dive into the Big Apple, 12 Surprising Facts About New York City uncovers everything from a secret train platform under Grand Central to NY’s own official muffin.
