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.

1

Ancient roots

Image: Miguel Teirlinck

Believe it or not, what we call Halloween began more than 2,000 years ago. The ancient Celtic festival of Samhain, held from October 31 to November 1 in what is now Ireland, Scotland, and parts of Britain, marked the shift from the harvest season to the dark days of winter. The Celts believed that, on that night, the boundary between the living and the dead grew dangerously thin. Spirits could slip through that barrier... both benevolent and darker ones.

2

Why scary costumes?

Image: JOHN BEARBY IMAGES

If the spirits of the dead were roaming the earth, what would you do? The Celts had a clever solution: they disguised themselves with animal skins and masks to look frightening and protect themselves from any spirits that might not have the best intentions. The hope was that ghosts would either mistake them for one of their own or be scared off entirely. Over time, the tradition evolved, but its roots remained; just look at all the little witches, skeletons, and other spooky costumes we see on Halloween today.

3

There's a reason for black and orange

Image: Gary Fultz

Orange and black take over homes and streets every Halloween, but why? The answer goes back to the Celtic festival of Samhain as well. Orange symbolized the end of autumn and fallen leaves, while black represented the darkness of the long winter nights ahead.

4

Witches weren’t always seen as scary

Image: Halanna Halila

Witches have been part of Halloween lore for ages. Countless stories cast them as spooky figures with flying broomsticks, pointed hats, and bubbling potions. But it wasn’t always this way. Among the Celts, many practices now labeled as "witchcraft" were connected to healing, spirituality, and nature, and weren’t seen as evil at all; that association came much later with the spread of Christianity. In fact, the English word "witch" is often linked to the Old English wicca (masculine) and wicce (feminine), meaning "wise one."

5

Trick-or-treating origins

Image: Robin Jonathan Deutsch

In addition to dressing up to protect themselves, the Celts also left treats on their doorsteps to appease wandering spirits. Over the centuries, that custom changed and spread. By medieval times in Europe, people—especially children—would go door to door during this season, offering prayers for departed souls or performing small songs and jokes in exchange for food or treats. This tradition, known as "souling" or "guising," eventually inspired the trick-or-treating we know today.

6

Scary tricks

Image: Nick Fewings

In the recent past, the "tricks" in trick-or-treating were no joke—they could be genuinely frightening. In the late 19th and early 20th centuries, Halloween was known far more for mischief than for candy. Kids pulled off pranks like tying doors shut or slamming windows to make homeowners think their houses were haunted. Scary? Yes. Fun? Definitely.

7

In the past, they weren't pumpkins

Image: Igor Omilaev

Pumpkins may be the stars of Halloween décor today, but they weren’t always the first pick. The tradition of carving Halloween lanterns also began in Ireland and Scotland, but not with pumpkins. In the old days, people carved turnips, beets, and other root vegetables. When Irish immigrants arrived in the United States in the 19th century, they found that pumpkins were bigger, softer, and far easier to carve, so pumpkins quickly replaced the turnips.

8

Halloween, SC

Image: Joseph Corl

Today, Americans put a lot of effort into Halloween celebrations. But perhaps no one embraces it more than the residents of Conway, SC, who made headlines for a bold decision. In 2022, the city officially adopted the monikers "City of Halloween" and "Halloween, SC" for the month of October. Although "Conway" remains its legal name year-round, the town uses the spooky nickname during the holiday season to attract visitors eager to experience its larger-than-life celebrations and decorations.

9

Parents also have their "tricks"

Image: Tolgahan Akbulut

Although trick-or-treating is mostly for kids, parents definitely get in on the fun. According to a 2019 survey, 74% of parents admitted to stealing a few pieces of their children’s candy. And honestly, who can blame them? A pumpkin bucket overflowing with sweets is hard to resist.

10

Paranormal full moon

Image: Ganapathy Kumar

Celebrating Halloween under a full moon has a special charm, as that lunar phase has long been linked to heightened paranormal activity. But this coincidence is rare: a full moon on Halloween only happens about every 18–19 years. The last full moon during Halloween was in 2020, and according to forecasts, we won’t see another until 2039.

1

Bannerman Castle, New York

Image: Erim Berk Benli

This crumbling fortress sits on a tiny island in the Hudson River, looking like something straight out of a Gothic novel . Francis Bannerman VI built it in 1901 to store his surplus military weapons because, apparently, his wife refused to keep thousands of munitions in the basement anymore.

The castle partially exploded in 1920 when some gunpowder got a little too excited, and it's been slowly deteriorating ever since. You can kayak out to the island or take a boat tour to see the ruins up close, where nature is slowly reclaiming the stone walls in a beautiful, apocalyptic sort of way.

2

Fonthill Castle, Pennsylvania

Image: Leyla M

Henry Mercer built this concrete monstrosity between 1908 and 1912. The guy was obsessed with tiles and built his castle as a showcase for his handmade ceramic collection , resulting in 44 rooms, 32 stairwells, and 18 fireplaces.

The castle has no blueprints because Mercer apparently just made it up as he went along, adding rooms and towers whenever the mood struck.

3

Gillette Castle, Connecticut

Image: Darya Tryfanava

William Gillette, famous for playing Sherlock Holmes on stage, built this eccentric castle in the 1910s and filled it with spy mirrors, secret doors, and wooden locks he carved himself . The place looks like someone dropped a medieval fortress into a blender with a detective novel.

The castle has 47 doors, none of which work like normal doors should, because Gillette apparently thought regular doorknobs were for boring people. Now it's a state park where you can wander through rooms designed by someone who clearly never met a quirk he didn't like.

4

Boldt Castle, New York

Image: Pascal Bernardon

George Boldt started building this Rhineland-style castle in 1900 as a Valentine's Day gift for his wife Louise . Then she died suddenly in 1904, and he immediately halted construction and never returned, leaving behind a monument to heartbreak on Heart Island in the Thousand Islands.

The castle sat abandoned for 73 years until the Thousand Islands Bridge Authority took it over and began restoration. Today you can visit via ferry and explore the grand halls, the powerhouse, and the perfectly intact bowling alley.

5

Castello di Amorosa, California

Image: Museum of New Zealand Te Papa Tongarewa

This one's a bit of a cheat since it was built in 2007, but it's so ridiculously authentic that it deserves a spot . Winemaker Dario Sattui spent 14 years and $40 million building a 13th-century Tuscan castle in Napa Valley, complete with a moat, drawbridge, and torture chamber, because apparently wine tastings needed more medieval flair.

The castle used 8,000 tons of hand-chiseled stone and over a million antique bricks imported from Europe. You can tour the dungeons, great hall, and of course, taste wine in a setting that makes you feel like you should be wearing chainmail instead of your Costco polo shirt.

6

Belvedere Castle, New York

Image: Birmingham Museum Trust

Perched on Vista Rock in Central Park, this miniature castle was built in 1869 as a Victorian folly —basically an expensive decoration that serves no practical purpose. It's now home to the Henry Luce Nature Observatory and offers panoramic views of the park, which is considerably more useful than its original job of just looking pretty.

The castle got a major renovation in the 1980s after decades of neglect left it looking more "haunted" than "enchanting." Today it's one of Central Park's most popular spots.

7

Bishop Castle, Colorado

Image: Art Institute of Chicago

Jim Bishop started building this castle by himself in 1969 and worked on it for over 55 years until his death in 2024 . The hand-built stone structure rises 160 feet into the Colorado sky and includes towers, walkways, and a dragon that breathes actual fire—all constructed by one incredibly dedicated (and possibly slightly unhinged) man.

There are no railings on many of the precarious walkways because Bishop didn't believe in them. Admission is still free, though you might want to update your will before climbing to the top of the tallest tower, where the views are spectacular, and the safety regulations remain charmingly absent.

8

Searles Castle, Massachusetts

Image: John Phelan

Edward Searles built this castle in 1888 in Great Barrington, Massachusetts, creating a 40-room mansion that combined Romanesque and Gothic styles into something that can only be described as "aggressively architectural." The castle features stained glass windows, carved woodwork, and enough turrets to repel a small army.

After changing hands several times, the castle is now home to the John Dewey Academy. You can't tour the interior since it's a school, but you can admire the exterior and imagine what it's like to do algebra homework in a building that looks like it should contain dragons.

9

Kip's Castle, New Jersey

Image: Birmingham Museum Trust

This English Tudor-style castle was built in 1902 by textile businessman Frederic Kip on a mountain in Montclair . The castle features towers, battlements, and spectacular views of Manhattan, proving that even early 1900s commuters wanted homes with dramatic flair and manageable drive times.

The castle has been through various owners and purposes, including a brief stint as a Prohibition-era speakeasy, because apparently nothing says "secret illegal bar" like a castle. Today it's used for private events, but the grounds are part of a county park where you can hike around and pretend you're visiting distant relatives who happen to be slightly eccentric nobility.

10

Chateau Laroche (Loveland Castle), Ohio

Image: ConlonTT

Harry Andrews started building this medieval castle in 1929 using stones from the Little Miami River , spending over 50 years creating his dream fortress. Andrews was inspired by his time in Europe during World War I and decided Ohio needed more castles, which is hard to argue with.

He built most of it himself using ancient techniques, including a primitive pulley system and sheer determination. Today, the castle is maintained by the Knights of the Golden Trail, a Boy Scout-like organization Andrews founded. You can tour the castle for a few bucks and marvel at what one man with too much time and enough river rocks can accomplish.