1

A bar hidden in plain sight

Most visitors know the famous Oyster Bar, but few stumble upon The Campbell, an elegant lounge tucked inside Grand Central. Originally the office of 1920s finance tycoon John W. Campbell , this spot sat forgotten for decades until 1999, before being restored to its former Jazz Age glory. Step inside today, and you’ll find velvet couches, grand rugs, and cocktails that make you feel like you’ve time-traveled back to the roaring 1920s.

2

Two clocks worth a fortune?

Grand Central has one of the most valuable clocks in the world , although there’s a myth that says there are two. The Tiffany clock outside towers 14 feet across, framed by Roman gods carved in stone. This clock is worth around $20 million. Inside the terminal, the four-faced opal clock crowns the information booth. Contrary to popular belief, this clock was not made of an actual opal, but out of opal glass, so there’s nothing priceless about it.

3

Hidden oaks and acorns

Take a closer look around, and you’ll start spotting oak leaves and acorns carved into chandeliers, railings, and stonework. These aren’t random designs. They’re a nod to the Vanderbilt family’s symbol: The acorn. The family funded the terminal’s construction in 1871 and wanted everyone to know it. Now, their family symbol quietly decorates every corner of their legacy.

4

The mysterious whispering gallery

If you whisper into one corner of the tiled archway near the Oyster Bar, someone standing diagonally across can hear you perfectly. The "Whispering Gallery" is one of Grand Central’s quirkiest secrets . The Guastavino tiles that make up the arched ceiling carry sound in an odd way, creating an intimate little magic trick, though no one really knows whether it was designed that way or just a happy accident.

5

A sky painted backward

Look up, and you’ll see the breathtaking celestial mural that covers the concourse ceiling. But here’s the kicker: the constellations are painted backwards . Whether it was a mistake or an artistic choice remains debated, but the Vanderbilts claimed it was intentional—to give us the "divine perspective" of looking down at the heavens. Either way, it’s still one of the most photographed ceilings in the world.

6

Game, set, match (inside a train station)

If you think tennis in a train terminal sounds impossible, think again. The Vanderbilt Tennis Club, perched on Grand Central’s fourth floor, is open to the public . You can book a court, take a lesson, or just peek inside to see this unexpected slice of luxury tucked away above the bustling commuters below.

7

Secret walkways above the windows

Those grand arched windows in the main concourse aren’t just decorative; they hide narrow walkways used by staff to move unseen between offices . These catwalks give a bird’s-eye view of the terminal, though they’re strictly off-limits to the public. Only a select few with key passes get to experience the view from up there.

8

A hidden entrance to the Waldorf

Deep beneath Grand Central lies Track 61, a secret passage that once connected directly to the Waldorf Astoria Hotel. It was used by VIPs who preferred to travel without public attention —most famously, President Franklin D. Roosevelt, who used it to conceal his polio and wheelchair from the public eye. Today, it’s sealed off, but the legend remains.

9

Almost lost to the wrecking ball

In the 1960s, plans were made to tear down Grand Central and replace it with skyscrapers. After the destruction of Penn Station in 1963, New Yorkers were not having it. Thanks to the efforts of preservationists , Grand Central was saved and officially declared a landmark in 1967. Their fight ensured we could still enjoy one of the city’s true architectural gems.

10

A 21st-century makeover

While much of Grand Central dates back to 1913, its evolution continues. The massive East Side Access Project, completed in 2023, added a new terminal for Long Island Rail Road passengers, complete with 40 miles of new track buried beneath Park Avenue. It’s a modern expansion of a century-old masterpiece.

1

It was invented in Switzerland

While the name suggests a US origin, the technology that created American cheese actually began in the heart of the Alps. It was developed in 1911 by Swiss researchers Walter Gerber and Fritz Stettler, who were looking for a way to extend the shelf life of their country’s famous Emmental cheese.

The problem with traditional cheese is that it eventually dries out, molds, or separates into a greasy mess when heated. By shredding the cheese, adding sodium citrate, and heating it, the Swiss duo discovered they could create a stable, smooth product that didn't separate. While they weren't trying to create "American" cheese as we know it today, their emulsification process laid the foundational science for every single-wrapped slice produced today.

2

It was popularized by a Canadian

The man responsible for the global dominance of American cheese was James L. Kraft. Ring any bells? Kraft was a Canadian immigrant who moved to Chicago in 1903. While he didn't invent the concept of processed cheese, he perfected the industrial scale of its production and marketing.

Kraft noticed that retailers struggled with cheese spoilage; if a wheel of cheddar didn't sell quickly, it was a total loss. He experimented with various methods of heating and blending cheese until he found a formula that could be canned and shipped long distances without spoiling. In 1916, he received a patent for his "processed cheese," and during World War I, the U.S. government purchased millions of pounds of it for soldiers, cementing its privileged place in the American diet.

3

It was almost called "Embalmed Cheese"

When processed cheese first hit the market, it had its detractors. Traditional cheesemakers were horrified, and so were pure food advocates. These critics argued that the product shouldn't even be called cheese. They’ve even gone so far as to call it "embalmed cheese" because of its unnaturally long shelf life and the chemical emulsifiers used to keep it stable. Yet, Kraft’s marketing prowess and the sheer convenience of the product ultimately won the naming battle. At least in the court of public opinion.

4

Technically, it isn’t cheese

Kraft may have won the battle among the people, but legally, American cheese is not considered cheese. If you look closely at the packaging, you will rarely see the word "cheese" on its own. Because of strict FDA regulations, most varieties are legally classified as "Pasteurized Process Cheese Product" or "Pasteurized Process American Cheese Food."

To be labeled "cheese," a product must be made primarily of milk, salt, and enzymes. Processed American cheese, however, is made by blending real cheese—usually cheddar or Colby—with emulsifying salts, whey, and sometimes extra milk or fats.

5

Any cheese can be made into American cheese

The term "American cheese" refers more to a process than a specific flavor. In theory, you could make "American-style" brie, blue cheese, or parmesan. The defining characteristic is the addition of an emulsifier, which breaks down the proteins and allows the fats and water to stay together.

In fact, some high-end chefs now make their own artisanal American cheese with aged cheddars processed with sodium citrate to create a slice that has the complex flavor of an expensive block but the melting point of a Kraft Single.

6

It isn’t naturally yellow

The vibrant orange-yellow hue of American cheese is entirely a cosmetic choice. Traditionally, cheese color varied by the season; when cows ate fresh grass in the summer, their milk contained more beta-carotene, leading to a naturally yellowish cheese. To make their cheese look high-quality all year round, cheesemakers began adding dyes.

American cheese takes this tradition to the extreme. It is typically colored with annatto, a seed from the achiote tree. Without this dye, American cheese would be a pale, creamy white, which is how it is sold in many delis as "White American". Yes, that’s right, there is no flavor difference between the white and yellow versions.

7

It has an extremely low melting point

The scientific superpower of American cheese is its meltability. Traditional cheeses have a protein structure that tightens when heated, which is why a slice of aged cheddar on a burger often results in an oily puddle and a rubbery clump.

Because of the emulsifying salts, the proteins in American cheese can withstand heat without clumping together. This gives it an incredibly low and stable melting point, transforming the slice into a silky sauce. This is why it remains the undisputed king of grilled cheese sandwiches.

8

It’s been in space

When you're hurtling through orbit in a cramped capsule, you need food that is stable, easy to eat, and won't crumble into thousands of tiny, electronics-clogging pieces. American cheese fit the bill perfectly for early NASA missions.

Processed cheese in tubes or cubes was a staple of the Apollo missions. Because it doesn't separate or sweat oil in varying temperatures and pressures, it was one of the few dairy products that could reliably provide flavor and calcium to astronauts.

9

It helped bring cheese to the masses

Before the advent of processed cheese, cheese was often a seasonal luxury. It was difficult to transport, expensive to store, and highly variable in quality. James L. Kraft’s invention changed that. By creating a product that was uniform in flavor and shelf-stable, he made cheese affordable and accessible to every corner of the United States.

10

The U.S. Government once gave it out

The U.S. government not only bought tons of American cheese during World War I. In the 1980s, the term "government cheese" became a thing. During a period of dairy surpluses, the government bought millions of pounds of cheese to prop up prices for struggling farmers.

To avoid letting it rot, the Reagan administration began distributing five-pound blocks of cheese to low-income families, seniors, and schools. For many who grew up in that era, that pale orange processed cheese was a lifesaver.

1

Potato chips

Back in 1853, a cranky diner in Saratoga Springs, New York, complained that his fries were too thick . Irritated, Chef George Crum sliced them paper-thin and fried them crisp to prove a point . To everyone’s surprise, the customer loved them.

What began as a moment of frustration turned into America’s favorite salty snack, inspiring an entire industry of chips and flavors.

2

Popsicles

In 1905, 11-year-old San Francisco native Frank Epperson accidentally left a cup of soda powder and water outside overnight, with a stick still in it. The next morning, it had frozen solid in the chilly air .

Epperson dubbed it the "Epsicle," which was later renamed the Popsicle. That childhood experiment became one of the most enduring summer treats.

3

Chocolate chip cookies

Ruth Wakefield ran out of baker’s chocolate when she was making traditional chocolate cookies at her Massachusetts inn, the Toll House, in the 1930s. She chopped up Nestlé chocolate snack bars instead . She expected them to melt evenly into the dough, but they stayed in chunks.

The warm, gooey results became an instant hit with her guests. Nestlé soon partnered with her to print the recipe on chocolate bar wrappers, and the rest is history!

4

Corn flakes

In 1898, the Kellogg brothers accidentally left cooked wheat, unprocessed wheat kernels simmered until tender, sitting out overnight at their Michigan sanitarium, where they promoted a healthy living based on vegetarianism, exercise, sunlight, and strict hygiene. By morning, it had gone stale, but when they rolled and baked it, the flakes came out crisp and tasty .

That happy mistake inspired a new breakfast idea: simple, wholesome, and ready to pour.

5

Coca-Cola

In one of the most profitable blunders of all time, Atlanta pharmacist John Pemberton was mixing a headache tonic in 1886 when he mistakenly blended his syrup with carbonated water instead of plain water .

Finding the result quite tasty, Pemberton opened a local soda fountain and found immediate success.

6

Cheeseburgers

In the 1920s, a teenage cook in Pasadena accidentally dropped a slice of cheese onto a sizzling hamburger . Instead of tossing it out, he served it to the customer.

The melted topping added a rich, savory twist that caught on fast. Soon, diners across America began adding cheese to burgers, helping to spread this classic.

7

Hard pretzels

One Pennsylvania baker in the 1800s left his soft pretzels in the oven too long, burning them to a deep brown . Expecting a disaster, he tried one and loved the unexpected crunch.

That overbaked batch became the first hard pretzel. The crispy, salty snack soon gained fans nationwide.

8

Slurpees

In the 1950s, a Kansas soda shop’s cooler broke down, freezing its drinks halfway . Instead of throwing them out, the owner sold the icy concoctions to curious customers.

They loved the slushy texture so much that he built a machine to reproduce it. The Icee — and later the Slurpee — turned an equipment failure into an omnipresent machine at every 7-Eleven.

9

Tortilla chips

In 1940s Los Angeles, a tortilla factory ended up with piles of leftover tortillas. Rather than waste them, workers cut them into triangles and fried them up .

The crunchy bites were a surprise hit. What started as a practical way to use scraps soon became a nationwide snack.

10

Tootsie Rolls

Crafty candy maker Leo Hirschfeld wanted to stretch his chocolate supply in 1896, so he experimented by blending in other ingredients such as sugar, corn syrup, and condensed skim milk . The texture turned chewy instead of smooth, but the flavor was rich and lasting.

He named it after his daughter’s nickname, "Tootsie." His thrift-born invention became a candy classic.

11

Reese’s Peanut Butter Cups

Back in 1928, a former Hershey employee, H.B. Reese, was tinkering with leftover chocolate at home when he combined it with sweetened peanut butter . The unexpected pairing turned out to be a great-tasting treat.

His homemade experiment evolved into a small business, and later became a candy legend when Hershey acquired the brand.

12

Fudge

According to the popular story, a batch of caramel didn’t heat properly one night , and the cook sighed that it had been "fudged." The softer texture, however, turned out wonderfully creamy.

That tasty error spread quickly through American kitchens and college towns, becoming the classic dessert that it is today.