1

The $2 bill is real and still legal

Image: Alicia Razuri

Yep, that mysterious $2 bill featuring Thomas Jefferson isn’t a collector’s fantasy. It’s still produced today (though rarely), and the reverse shows the Signing of the Declaration of Independence. People tend to save them, thinking they’re rare, but you can spend them just like any other bill.

2

The penny used to be made of pure copper

Image: Adam Nir

During WWII, copper was needed for ammo, so in 1943, pennies were made from steel and coated in zinc. They looked silver and rusted easily, some even stuck to magnets! Today, most pennies are actually 97.5% zinc with just a thin copper coating.

3

George Washington didn’t appear on the first $1 bill.

Image: Jonathan Borba

The very first $1 bill (from 1862) featured Salmon P. Chase, the Secretary of the Treasury at the time. Washington didn't show up until 1869, and Chase had a not-so-humble role in placing his own face there.

4

There’s a tiny owl hidden on the $1 bill

Image: rc.xyz NFT gallery

Take a magnifying glass to the upper-right corner of the "1" on a dollar bill. Some people swear there’s a tiny owl or spider hidden in the pattern, said to symbolize wisdom or surveillance. Officially, it's just part of the ornate design, but still a fun little mystery!

5

The $100,000 bill actually existed

Image: Dmytro Glazunov

No, you can’t use it at Target. Printed in 1934 and featuring Woodrow Wilson, this gold certificate was used only for transactions between Federal Reserve Banks. It was never meant for public use, and owning one today is illegal!

6

Lincoln faces the other way for a reason

Image: JustStartInvesting

On most bills, presidents face to the right. But on the penny, Lincoln faces left. One theory is that the designer used a portrait that happened to face left, but it also makes Lincoln the only president looking "inward" when coins are lined up in value order.

7

"In God We Trust" wasn’t always on our money

Image: Jonathan Borba

That phrase didn’t become mandatory on U.S. currency until 1955 during the Cold War. It first appeared on coins in 1864, but the push to include it everywhere came as a nod to America’s spiritual identity in contrast to atheistic communism.

8

Coins last way longer than bills

Image: Barry A

Your average dollar bill survives about 6.6 years in circulation. Coins? They can keep going for 30 years or more! That’s why coins are still a budget-friendly way for the government to make money — and we mean that literally!

9

The buildings on the back aren’t random

Image: Ryan Quintal

Each bill’s reverse side typically features a building related to the person on the front. For instance, the Lincoln Memorial is on the back of the $5 bill (with Lincoln on the front), and the White House appears behind Andrew Jackson on the $20 bill. The choice of course had to do with government history itself! Which building do you think is missing?

10

There are secret codes on every bill

Image: Andrew Dawes

Look closely and you’ll spot tiny letters and numbers that identify which printing plate was used and where the bill was made. Ever see a tiny "F6" on a $1? That means it was printed in Atlanta, Georgia.

11

A dollar is technically made of cloth

Image: Live Richer

Despite calling it "paper money," U.S. bills are actually made of 75% cotton and 25% linen. That’s why they feel so distinct, and don’t shred like regular paper when they get wet (though they still don’t love laundry day).

1

Locomotive steam-engine for rail (Patent #1)

Image: National Archives at College Park - Textual Reference, Public domain, via Wikimedia Commons

Between 1790 and 1836, the United States granted 9,802 patents that were not awarded on their merits and didn’t have an identification number. The Patent Act of 1836, which established the official Patent Office, aimed to make the system more transparent. Among other reforms, it introduced a numbering system for easier identification.

This system started on July 13, 1836, and remains in effect today. United States Patent No. 1 was issued to John Ruggles —an inventor, attorney, and senator from Maine—for improvements in locomotive traction.

2

Anesthesia (Patent #4,848)

Image: National Library of Medicine

How did patients endure surgery before anesthesia? Before the discovery of an effective anesthetic, surgery was synonymous with excruciating pain. Many large hospitals placed their operating rooms in isolated and remote sections of the hospitals so patients’ screams couldn’t be heard. Alcohol, opium, and even hypnotism were tried as methods of pain relief, but these had little effect.

Fortunately, we no longer have to endure such experiences, thanks to a Boston dentist named William T. G. Morton, who—along with Charles T. Jackson—received the first United States patent for an anesthetic in November 1846.

3

Buoying vessels over shoals (Patent #6,469)

Image: invented by Abraham Lincoln. Issued by United States government Patent Office, Public domain, via Wikimedia Commons

This may be the most unique patent ever issued by the United States Patent Office: it is the first and only U.S. patent granted to an inventor who later became president. Although at least three presidents—George Washington, Thomas Jefferson, and Abraham Lincoln—were inventors, Lincoln is the only one who formally applied for and received a patent .

In 1849, he was awarded Patent No. 6,469 for a flotation device designed to lift boats over shoals and other obstacles in the water. While the invention itself had little bearing on his election, Lincoln’s inventive mindset and mechanical curiosity served him well during his presidency. Although the device was never commercially produced, his appreciation for innovation helped shape the nation's future.

4

Beehive (Patent #9,300)

Image: Bianca Ackermann

Beekeeping arrived in America with the early settlers, and by the end of the 18th century, bee colonies were widespread. However, early efforts met with only partial success.

The first U.S. patent for a practical and effective movable-frame beehive—which revolutionized traditional methods of beekeeping—was granted to American apiarist, clergyman, and teacher Lorenzo Lorraine Langstroth on October 5, 1852. His invention of the "bee space" laid the foundation for all modern beekeeping and hive management.

5

Elevator (Patent #31,128)

Image: Copie de gravure ancienne, Public domain, via Wikimedia Commons

The New York skyline would look very different today had it not been for the invention of the elevator. The man responsible for the forerunner of the modern elevator was American industrialist Elisha Graves Otis , who, on January 15, 1861, received the first U.S. patent for a safety-type passenger elevator.

The concept of vertical travel was not new. However, the first successful passenger safety elevator was installed in 1857 by Otis in the E. V. Haughwout & Company building, a department store in Manhattan. Otis also held patents for other inventions, including railroad trucks and brakes, a steam plow, and a bake oven. But it was the elevator with its safety feature that brought him fame and his sons great fortune.

6

Lock (Patent #31,278)

Image: Parastoo Maleki

The idea of the lock probably stems from the time man first acquired goods he wanted to safeguard from others. However, the first commercially successful modern lock and key system was invented by American mechanical engineer and metalsmith Linus Yale Jr., who received a U.S. patent in 1861.

Yale developed several types of locks, including the Yale Double Treasury Bank Lock, created at the request of the U.S. government. These designs brought him nationwide recognition, but the invention that made him truly famous was the pin-tumbler cylinder lock . Yale died just a few years after receiving his patent. However, every lock and key produced by the Yale & Towne Lock Company since then has proudly carried the Yale name.

7

Barbed wire (Patent #157,124)

Image: Lexis Chadwick

In an age of video surveillance, barbed wire might seem obsolete. Yet it was crucial to the settlement of the American plains in the late 19th century—and it remains widely used around the world today .

On November 24, 1874, Joseph F. Glidden, a farmer from Illinois, received a U.S. patent for the first commercially successful barbed wire . While several earlier patents had been granted for wire fencing, it was Glidden’s design that proved durable, affordable, and easy to mass-produce—making it the dominant form of fencing on the frontier**.**

8

Air conditioner (Patent #808,897)

Image: Prasopchok

On those hot and humid days of summer, we should all be thankful for the work of Willis Haviland Carrier, often called the father of air conditioning. For his efforts, he received the first U.S. patent for a modern air conditioning system on January 2, 1906.

Air conditioning is a complex process that involves refrigeration, dehumidification, air purification, and circulation. Before Carrier’s invention, various individuals had worked on these individual components. But it was Carrier, an American engineer, who successfully integrated them —focusing on the crucial relationship between temperature and humidity.

9

Airplane (Patent #821,393)

Image: John T. Daniels, Public domain, via Wikimedia Commons

Orville and Wilbur Wright are credited with achieving the first controlled, manned flight in history. For their pioneering work, they received the first U.S. patent for an airplane, issued on May 22, 1906.

Many had been intrigued by the idea of human flight before them. However, it was the Wright brothers who succeeded in building, flying, and promoting the world's first successful airplane —an invention that revolutionized transportation.

10

Bakelite (Patent #942,809)

Image: Call Me Fred

The modern plastics industry wouldn’t exist without Belgian-American chemist Leo Hendrik Baekeland , who received the first U.S. patent for a thermosetting plastic in 1909. Before him, others had attempted to produce synthetic resins but were unsuccessful.

Baekeland corrected his predecessors’ mistakes. The result was the first thermosetting resin —one that, once set, would not soften under heat. Bakelite was the first in a long series of resins that shaped the U.S. economy, paving the way for materials such as cellophane, acetate, vinyl, Plexiglas, acrylic, Formica, and polyester.

11

Frozen food (Patent #1,773,080)

Image: United States Patent Office (Clarence Birdseye, inventor)., Public domain, via Wikimedia Commons

Do you know where the name Birds Eye Frozen Food comes from? From its inventor! In 1930, American entrepreneur Clarence Birdseye received the first U.S. patent for this type of product.

Food preservation has been a concern since the beginning of time. Techniques such as salting, pickling, smoking, curing, canning, and later inventions like the icebox and home refrigerator have all contributed to preserving food.

However, one of the most successful methods was developed and commercialized by Birdseye. His process involved quick-freezing meat, seafood, vegetables, and fruit in convenient packages without altering their original taste. Birdseye’s name became a household word, and his innovation created a multibillion-dollar industry.

12

Instant photography (Patent #2,543,181)

Image: Missouri Historical Society, Public domain, via Wikimedia Commons

When we think of instant photography, Polaroid is often the first name that comes to mind. But how much do we know about the man behind the company? American scientist, inventor, and co-founder of the Polaroid Corporation, Edwin Herbert Land , was granted the first U.S. patent for a one-step photographic process in 1951.

While on vacation with his family, Land conceived the idea for a camera and film that could produce an immediate photograph. In 1948, the first Polaroid Land Camera went on sale, though without much public approval. Polaroid continued to improve the Land Camera and, in 1965, introduced the affordable Swinger model , which became an immediate success. Throughout his life, Land was granted more than 533 patents, was inducted into the National Inventors Hall of Fame, and received the Presidential Medal of Freedom.

1

Neon Museum - Las Vegas, Nevada

Image: 李林Alwen

Let’s kick off this list with the Neon Museum in Las Vegas. The location seems just about right since Las Vegas is always bright and shining with luminous signs.

This museum, founded in 1996, holds a collection of over 250 historic signs from the city. It is located a few blocks away from the iconic Las Vegas Strip and exhibitions and projections display signs that once adorned the venue. Moreover, you will be able to see some paradigmatic signs restored like the Silver Slipper and Benny Binion’s Horseshoe.

2

International Spy Museum - Washington, D.C.

Image: Marten Newhall

Haven’t we all dreamed of becoming an international secret spy? Well, you can make your dream come true, at least for a few hours, at the International Spy Museum in Washington.

This museum was established in 2002 and it features the largest collection of international espionage artifacts ever displayed. From spy gadgets and concealed weapons to covert operations and famous espionage cases, you’ll get inside the life of a true spy.

Furthermore, it is an interactive museum so visitors can test their own skills with the experiences offered within the establishment.

3

National Mustard Museum - Middleton, Wisconsin

Image: Simona Sergi

Mustard is so much more than just a condiment, and if you think it is not, the National Mustard Museum is here to challenge that notion.

Founded in 1992 by Barry Levenson, this quirky museum celebrates all things mustard with the world’s largest collection of mustards and mustard memorabilia. It showcases over 6000 mustards from over 70 countries and visitors can learn about the mustard history and take a look at antique elements like tins, mustard pots, vintage signs, and advertisements.

If you are a foodie or a culinary curious, you can’t miss this museum!

4

Idaho Potato Museum - Blackfoot, Idaho

Image: Lars Blankers

Idaho’s love and pride for potatoes is so big, that they had to build a museum to display it and they are waiting for you!

The Idaho Potato Museum is a spud-tacular tribute to the beloved potato, fittingly located in the "potato capital of the world." Housed in the former Oregon Short Line Railroad Depot, this space of over 5,500 square feet offers exhibits on the history, cultivation, and nutritional value of the humble tuber.

Highlights include one of the world’s largest collections of potato mashers and the biggest potato crips ever made. Visitors can even perform experiments in the Potato Lab and savor a freshly baked potato in the museum’s cafe.

5

International UFO Museum and Research Center - Roswell, New Mexico

Image: Danie Franco

UFOs have always raised curiosity and the theories behind sightings and paranormal activities are one too many, right? Or at least enough to create a museum devoted to exhibiting all things UFOs.

The International UFO Museum and Research Center offers an intriguing exploration into the world of UFOs, and it is housed in a former movie theater. The creation of the museum was inspired by the Rosewell incident in 1947, a crash of a flying saucer, and it presents a variety of written, audio, and visual materials.

This museum is pet friendly and visitors can enjoy exhibits like a spinning UFO with aliens and an outdoor "Rosewell Belevies" mural. When are you paying a visit?

6

National Museum of Funeral History - Houston, Texas

Image: panyawat auitpol

There’s no denying it, we are going to die eventually. However, is death enough of an intriguing topic to open a museum devoted to it? Apparently, it is, and you can find one in Houston.

The National Museum of Funeral History houses the country’s largest collection of funeral service items, including caskets, coffins, and hearses.

The museum is over 30,000 feet and it features 19 permanent exhibits covering topics that range from embalming to the history of cremation and mourning photography. To make it even more interesting, the museum offers a unique look at funeral traditions and culture from ancient Egypt to modern times around the world.

7

Museum of Bad Art - Somerville, Massachusetts

Image: Rainer Bleek

Even if art is not for everyone, we can all agree there are standards for what is considered good or bad, right? Well, The Museum of Bad Art is here to prove us wrong!

Located in Somerville, the Museum of Bad Art is a delightful celebration of artistic mishaps and quirky creativity. What began in 1993 in a Boston basement has now expanded to the Somerville Theater’s basement in Davis Square.

This unique museum boasts over 700 pieces from artists, amateurs, and anonymous creators, featuring donations, thrift store finds, and gifts from the artists themselves. Despite its impressive collection, only about 25 works are displayed at a time , ensuring a fresh experience with each visit. Best of all, it’s free! For a fun and offbeat adventure, this is the place you need to visit!

8

National Bottle Museum - Ballston Spa, New York

Image: James Cousins

Here’s a museum you never thought would exist! But considering bottles are part of our everyday life, have you ever stopped and thought about how bottles are made? Wonder no more, better visit the museum!

The National Bottle Museum is a charming three-story brick building and it showcases over 3,000 bottles on its first floor alone! With seven permanent exhibits, you can marvel at pre-machine-made bottles from every state and even see glowing uranium glass!

Don’t miss the quirky temporary exhibits that go from Coca-Cola bottles to shot glasses, and spa bottles! And, if you are a bottle collector yourself, you’ll love the extensive library available!

9

Sindecuse Museum of Dentistry - Ann Arbor, Michigan

Image: Jonathan Borba

Teeth are the subject of contrarian opinions! Some love it, some find it disgusting. But that wasn’t enough of a reason to prevent Michigan from having a museum devoted to dentistry.

The Sindecuse Museum of Dentistry in Ann Arbor is a hidden gem tucked away in the atrium of the University of Michigan School of Dentistry. It’s one of the few museums in the world dedicated entirely to dentistry!

With over 25,000 objects on display, you will find everything from antique dental tools to quirky historical products dating back to the 18th century. The museum also features fascinating temporary exhibits and engaging programs. Plus, admission is free, so you can enjoy this unique journey through dental history without spending a dime.

10

Museum of Jurassic Technology - Los Angeles, California

Image: Mauro Sbicego

You read that right, the words "Jurassic" and "technology" are part of the same name and they have nothing to do with Spielberg’s millionaire production.

The Museum of Jurassic Technology in Los Angeles is an enigma wrapped in a mystery. Despite its name, there’s nothing particularly Jurassic about it. Instead, this delightfully bizarre museum leads you through dimly lit halls filled with curiosities, from mini models of Napoleon and Daffy Duck to oil portraits of Soviet space dogs.

It’s a wonderfully chaotic mix that keeps visitors scratching their heads and smiling. Perfect for those who love a good mystery, the museum’s quirky collection is as baffling as it is fascinating. Come ready to be amused and bewildered!