General General 5 min read

Meaningful relationships

Discover the amazing sister cities of these 10 American cities!

Image: Mikhail Nilov

As the great '70s band Sister Sledge once sang, "We are family, I got all my sisters with me." Family is definitely important, and having a few siblings to accompany us along the journey of life is certainly a blessing. In that sense, most American cities are fortunate to have their fair share of sister cities spread around the world. We have decided to select a few of the most prominent. While we would have loved to include all the sister cities we found, there are simply too many to count, so we’ll have to settle for highlighting 10 of our favorites. Enjoy!

1
Santa Fe, New Mexico

Image: Doni Rath

We’ll start with one of the most logical sisterhoods on this list: Since the capital city of New Mexico shares a name with the Spanish city of Santa Fe (full name "Santa Fe de La Vega"), it seems only reasonable for them to become sister cities—a relationship that was established in 1983.

Santa Fe was one of the first sister cities to the American city, and their bond remains strong. Both cities engage in various ways, whether through true cultural exchanges, economic insights, or tourism opportunities.

2
New York City, New York

Image: Alex Haney

Since New York City is probably the most famous American city in the world, it stands to reason that "The City That Never Sleeps" has many sister cities around the globe. We could have chosen from a long list of truly outstanding cities like London and Budapest, but we ultimately decided to showcase Tokyo. After all, both NYC and the Japanese capital share a buzzing and energetic atmosphere, filled with dazzling lights and exciting opportunities.

Interestingly, many of New York City’s boroughs have sister locations of their own. For instance, Brooklyn is the sister borough of Lambeth, a neighborhood located in southern London. Not only that, Manhattan is related to the Seocho district in Seoul, South Korea, while the municipality of Ulcinj in Montenegro is a sister to Staten Island.

3
Los Angeles, California

Image: Jeremy Bishop

As a cultural hub and "the Entertainment Capital of the world," Los Angeles has several noteworthy siblings. In fact, it is one of the American cities with the most related cities, with 25 sisters as of 2024.

The city of Eilat, Israel, has the distinction of being Los Angeles’ first sister city, established in 1959. That same year, "The City of Angels" also became sister cities with Nagoya, Japan. Other notable sister cities of L.A. include Berlin, the capital of Germany, as well as Mexico City and Bordeaux, France.

4
San Francisco, California

Image: Alexey Komissarov

As we are sure you know, San Francisco was built on a monastery founded by Spanish explorers in the 18th century, and it is from this early settlement that the city gets its name. In that sense, it stands to reason that the "Golden Gate City" shares a relationship with one of the most prominent cities in Spain.

While San Francisco is a sister city to 17 other locations (including Osaka, Japan, and Sydney, Australia), Barcelona is its only Spanish sister city. The relationship was established in 2010, and in 2018, Barcelona was honored alongside all of San Francisco's sister cities with a signpost in Hallidie Plaza.

5
Austin, Texas

Image: Tomek Baginski

Who could be a better sister city to the capital of our largest Southern state than someone from the "Land Down Under"? Since 1983, Austin, Texas, has been a sister city to Adelaide, one of the most prominent southern cities in Australia.

Remarkably, these cities share a number of amazing qualities: they are both filled with lush green scenery from their many parks, and they are crossed by equally beautiful rivers. Not only that, they are both music lovers: Adelaide is the first Australian city to be declared a UNESCO City of Music, while Austin is globally known as "the live music capital of the world."

6
Boring, Oregon

Image: everett mcintire

The town of Boring, Oregon , surely has had some tough luck: after all, would you like to visit a town with that name? The truth is that there’s nothing dull about this town; it was built in a former lava field (a rather exciting landscape, if we do say so ourselves) and named after William Harrison Boring, an early resident who helped build the town.

In any case, Boring’s rather unusual name has landed this town with kindred spirits. Since 2012, this town has been part of a group known as the "Trinity of Tedium." Alongside the village of Dull, Scotland, and the community of Bland, Australia, Boring has proven again and again that friends can be found in the most unusual of places.

7
Hackettstown, New Jersey

Image: Hunter Reilly

This is the only town on this list that shares an (almost) identical name with its sister. Hackettstown, New Jersey , is famous for being the headquarters of the beloved Mars corporation, which caters to the "sweet teeth" of many Americans. It was named after Samuel Hackett, an early settler of the area who helped build the community.

In 2011, this New Jersey town declared Hacketstown, Ireland, as its sister city. In case you are not familiar with this small Irish town, here’s a fun fact that might make you fall in love with it: Hacketstown was once the home of William Presley, an ancestor of the King of Rock 'n' Roll himself.

8
Boston, Massachusetts

Image: Matthew Landers

In 1959, the city of Kyoto, Japan, became Boston’s first sister city . When you think about it, this relationship makes perfect sense: both cities are known as cultural and economic hubs and have strong and independent identities. According to the city of Boston’s official website, both of these metropolises share "strong neighborhood identities."

Throughout the decades, Boston and Kyoto have hosted several events, including annual exchange programs for high school students. Not only that, Kyoto gifted the Boston Children's Museum a "Japan House" in a display of kinship that is still warmly remembered by the capital city of Massachusetts.

9
Seattle, Washington

Image: Thom Milkovic

You might be familiar with a traditional Irish song called "Galway Bay." It has been covered by iconic American artists like Johnny Cash and Bing Crosby. This lovely tune is particularly famous among Irish Americans and speaks about nostalgia and the longing to gaze upon Ireland’s breathtaking shores. In that sense, should you suddenly feel overwhelmed by the powerful message of this song, we can offer you the next best option in America: Galway’s very own sister city, the wonderful Seattle .

Seattle and Galway became sisters in 1986, and two corresponding bronze markers were placed in each city to mark the distance between them. Many cultural events and exchanges are organized by the Seattle Galway Sister City Association, which helps build the relationship between these two wonderful cities.

10
Washington, D.C.

Image: Sara Cottle

Our capital city is considered by many to be the personification of American democracy. After all, it houses both the White House and the Capitol Building and is named after the Father of our Country. Bearing that in mind, can you think of a better sister city for Washington D.C., than the birthplace of democracy?

Washington D.C., became the sister city of Athens, Greece, in 2000. Curiously, Athens is also the sister city to another American city, although perhaps less famously: the Greek capital city also maintains a relationship with the identically named city of Athens, Georgia.

General General 3 min read

You are using one of these now.

From microwaves to bug spray: 12 items originally made for the military

Image: Everyday basics

You might be surprised to learn how many everyday items in your home started as military inventions. From your kitchen to your closet, many tools and technologies first created for soldiers have since marched their way into civilian life. Take a look at 12 of these army-born innovations you probably use every day without even realizing it.

1
Duct tape

Image: Lucas van Oort

One of the most useful things to have around is, without a doubt, duct tape. This product can help fix an endless number of everyday problems in virtually any environment.

This adhesive tape was invented during World War II by a division of Johnson & Johnson called Revolite. It was initially used to seal ammunition cases because of its water-resistant properties.

2
GPS

Image: henry perks

The GPS technology we all use daily on our smartphones to navigate from point A to point B was originally developed by the U.S. military. It was designed to track the position of military units and help them find their way efficiently across any terrain —much like how we use it today for civilian purposes.

3
Internet

Image: Glenn Carstens-Peters

Few technologies have become such a big part of our lives in just a couple of decades as the Internet. Its origins trace back to the 1970s, when the Defense Advanced Research Projects Agency (DARPA) created an interconnected network linking military centers to enable resource sharing.

The connection of commercial networks and enterprises by the early 1990s, along with the advent of the World Wide Web, marked the beginning of the transition to the modern Internet.

4
Walkie-talkie

Image: garrett parker

From children’s toys to invaluable communication devices used in critical situations, walkie-talkies are a common fixture in modern life. Their development during World War II has been variously credited to Donald Hings, radio engineer Alfred J. Gross, Henryk Magnuski, and engineering teams at Motorola.

Initially used by infantry, similar designs were created for field artillery and tank units. After the war, walkie-talkies spread to public safety and eventually commercial use.

5
Microwave oven

Image: Erik Mclean

Believe it or not, microwave cooking was accidentally discovered during a military-related project just after World War II.

In 1946, Percy Spencer, a scientist working on a magnetron at Raytheon, noticed that a peanut cluster candy bar in his pocket had melted from the magnetron’s microwave radiation. Curious to experiment further, he brought in some kernels of corn and made the first-ever microwave popcorn—leading to the invention of the microwave oven.

6
Super glue

Image: Scott Sanker

In 1942, a research chemist working for a defense contractor was developing a high-precision targeting sight for weapons. Although the project didn’t produce the expected results, the resulting product was incredibly sticky , leading to the creation of the now-famous Super Glue.

7
Aviator sunglasses

Image: Griffin Wooldridge

Aviator sunglasses were developed in the 1930s as a lighter alternative to the bulky goggles worn by pilots during the early years of aviation. Those goggles were heavy, uncomfortable to wear, and prone to fogging up mid-flight.

Colonel John Macready of the U.S. Army Air Corps helped develop the first set of aviator sunglasses, which became known as Ray-Bans—named for their purpose: banning the sun’s rays from a pilot’s eyes.

8
Packaged salad mixes

Image: Nathenia Landers

The bags of packaged salad mixes found at any local supermarket use "modified atmosphere packaging" to delay ripening and spoilage.

This technology was developed in the 1960s through a collaboration between Whirlpool Corp. and the U.S. Navy to send fresh lettuce and celery to troops in Vietnam .

9
Bug spray

Image: Wolfgang Hasselmann

The active ingredient in most insect repellents, known as DEET, was developed by the U.S. Army in 1946 for use by military personnel operating in insect-infested areas . The product’s success led to its commercial release.

10
Disposable sanitary pads

Image: Annika Gordon

During World War I, Kimberly-Clark invented Cellucotton, a wood pulp–based material designed to be more absorbent and cost-effective for use in bandages.

After the war, the company discovered that Army nurses had repurposed Cellucotton as sanitary napkins , which inspired the creation of Kotex—the first disposable sanitary pads.

11
Frozen juice concentrate

Image: Fotografía de Alimentos

In 1942, USDA scientists developed frozen concentrated orange juice during World War II to help provide soldiers with sufficient Vitamin C . Although it was never distributed to the military, the product was later introduced to consumers by Minute Maid.

12
WD-40

Image: Daniel Campbell

WD-40, now a common household product, was originally developed in 1953 to prevent rust and corrosion on the outer shell of the Atlas missile . Created by the Rocket Chemical Company, the name WD-40 stands for "water displacement," with the "40" representing the number of attempts it took to perfect the formula.

History History 3 min read

I want to believe

Why do we knock on wood for good luck? 12 common superstitions explained

Image: Susannehs

We’ve all heard about the seven years of bad luck that are said to follow if we break a mirror, or why tossing salt over one’s shoulder is supposed to keep misfortune away. Superstitions have been a part of everyday life in the U.S., often passed down through generations without much thought to their origins. Let’s take a look at the origins of 12 common superstitions that continue to influence how people think and act today.

1
Breaking a mirror

Image: Savannah B.

As we’ve all heard, breaking a mirror is said to bring seven years of bad luck— a belief that dates back to the Romans . They thought a mirror didn’t just reflect your face, but also your soul.

Because the Romans also believed that life renewed itself every seven years, the curse was thought to last exactly that long.

2
Walking under a ladder

Image: Nick Fewings

This superstition has its roots in medieval Europe, where ladders leaning against walls formed a triangle, a shape that symbolized the Holy Trinity .

Walking through it was seen as breaking the sacred shape and inviting misfortune. Today, most people avoid it not only out of superstition but also for simple safety.

3
A black cat in your path

Image: Emmeli M

In the Middle Ages, black cats were linked to witchcraft and were thought to be witches’ companions—or even witches in disguise. Crossing paths with one was considered dangerous .

Though many cultures view black cats as lucky, in the U.S., the old stigma has persisted.

4
Knocking on wood

Image: Glen Carrie

The habit of knocking on wood to ward off bad luck likely comes from ancient pagan traditions. Trees—especially oaks—were believed to house protective spirits .

Touching or knocking on wood was a way to call on those spirits for protection. The phrase and the action traveled across centuries, and now it’s a common phrase in everyday conversations.

5
Opening an umbrella indoors

Image: Kato Blackmore 🇺🇦

The superstition that opening an umbrella indoors brings bad luck originates from 18th-century England. Early umbrellas were large, stiff, and often had metal spokes.

Opening one indoors could cause injury or break household items , so the "bad luck" warning worked as a practical safety rule.

6
Friday the 13th

Image: Nik

Friday has long been considered unlucky in Christian tradition because it was said to be the day of the Crucifixion. The number thirteen was also viewed as ominous, connected to the Last Supper .

When the two were combined, Friday the 13th gained its spooky reputation. Despite rational explanations, some hotels skip floor 13, and many people still avoid major plans on that date.

7
Spilling salt

Image: ekaterina shishina

Salt was once precious and expensive, symbolizing purity and friendship. Spilling it was considered wasteful and unlucky in ancient times.

The practice of tossing a pinch over your left shoulder comes from folklore, supposedly to blind the devil lurking there . It’s a tiny gesture that still lingers on dinner tables today.

8
Four-leaf clover

Image: Barbara Krysztofiak

The four-leaf clover is a symbol of good fortune dating back to the Celts, who believed the rare leaves provided protection against evil spirits .

Since clovers typically have only three leaves, the fourth leaf came to symbolize rarity and luck.

9
Rabbit’s foot

Image: Timofei Adrian

Carrying a rabbit’s foot for luck traces back to African and European folklore, where rabbits were seen as fertile, magical creatures .

The superstition spread through American culture in the 19th century, especially in the South. Even though it might seem unusual—and potentially unsanitary—the lucky rabbit’s foot remains a well-known charm today.

10
Wishbone

Image: Museum of New Zealand Te Papa Tongarewa

The tradition of making a wish on a wishbone originates with the Romans, who, in turn, borrowed it from the Etruscans. They believed that birds held divine powers .

Breaking the bone with someone else was thought to transfer luck to the person who ended up with the larger piece .

11
Coin in a fountain

Image: Lila Mitchell

Tossing a coin into water to make a wish has its roots in ancient Europe. Wells and springs were considered sacred, often associated with gods or spirits.

People dropped coins as offerings for health or good fortune . Today, fountains across the U.S. and around the world collect millions of coins.

12
Wishing upon a star

Image: Ali

The superstition of wishing upon a star comes from ancient Greece and Rome, where falling stars were believed to carry messages from the gods .

Even today, looking up at the night sky and spotting a shooting star inspires many people to make a wish.

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