1

Area 51

Image: Michael Herren

Location: Nevada

Shrouded in secrecy, this military base has become synonymous with UFOs and government cover-ups. Its official purpose was testing aircraft like the U-2 spy plane and Stealth Bomber, but its classified nature fueled decades of wild speculation, ranging from secret weapons to actual aliens working for the government.

2

Coral Castle

Image: Audric Wonkam

Location: Florida

This massive stone structure was built by a single man, Edward Leedskalnin, using enormous limestone blocks—some weighing 30 tons. According to him, no heavy machinery was ever used during the construction, and he even claimed to know the secrets of the pyramids . To this day, engineers and historians debate how he moved and placed those stones with such precision.

3

Skinwalker Ranch

Image: Jacob Padilla

Location: Utah

This 512-acre property has long been at the center of UFO sightings, cattle mutilations , and alleged portals to other dimensions. The stories were so compelling that, in the ’90s, a private research organization purchased the ranch to try and make some scientific sense of the claims, conducting extensive field studies. However, after nearly a decade of research, they found no conclusive evidence.

4

Mammoth Cave

Image: Ksenia Kudelkina

Location: Kentucky

The world’s longest known cave system has its fair share of unexplored tunnels, ghost stories, and strange air currents. More than 400 miles have been mapped , yet many passages remain uncharted. Researchers have yet to fully understand the cave’s underground ecosystem, and new chambers are still being discovered today.

5

The Marfa Lights

Image: Alexandra Vo

Location: Texas

Reported since at least the late 19th century, floating orbs of light have been seen near this small town with no consistent explanation. Night watchers continue to gather at designated viewing areas along Highway 90, hoping for a glimpse. While scientific studies suggest that distorted car headlights are the most likely cause, many remain convinced otherwise.

6

The Devil’s Kettle

Image: Andrew Ling

Location: Minnesota

This unusual waterfall splits in two—one half flows normally, while the other vanishes into a deep pothole with no known exit. Scientists poured dye, ping-pong balls, and even GPS trackers into the mysterious hole, all to see where the water ends up. While researchers eventually confirmed it rejoins the river underground, exactly how and where remained elusive for decades.

7

Cahokia Mounds

Image: pcrm Dorego

Location: Illinois

Built centuries before Columbus arrived in the Americas, the ancient city of Cahokia featured massive earthen mounds, wooden palisades, and likely formed part of complex trade networks across the continent. Despite having a population rivaling London in the 1200s, according to archaeologists, the city was mysteriously abandoned in the span of a few years. No written records explain its decline, though environmental stress, resource shortages, and internal social factors are often cited as possible causes.

8

Blythe Intaglios

Image: Alexander Schimmeck

Location: California

Similar to Peru’s Nazca Lines, these giant geoglyphs are etched into the desert floor, seemingly visible only from the sky. Created by scraping away dark rocks to reveal lighter earth beneath, the figures are believed to be between 450 and 2,000 years old, depending on the specific design. While their exact purpose remains a mystery, they are believed to have had a ceremonial function.

9

The Spooklight

Image: Ben Griffiths

Location: Missouri-Oklahoma Border

Also known as the Hornet Spooklight, this floating orb has been seen since at least the late 19th century. It appears along a rural stretch of road near the small community of Hornet, Missouri, and Quapaw, Oklahoma. While some theorize it could be caused by car lights from miles away, some sightings predate automobiles.

10

Roanoke Island

Image: Stephen Crane

Location: North Carolina

In the 1580s, an entire colony vanished overnight, leaving behind only the word "Croatoan" carved into a tree. No graves, no remains—just an eerie disappearance that sparked centuries of theories, from disease and starvation to assimilation with local tribes. Modern archaeology uncovered European artifacts at sites associated with Native groups miles away, but no definitive evidence has ever solved the mystery.

1

Jesse James

Image: Jaye Haych

Born in 1847 and raised in western Missouri , Jesse James and his brother Frank earned a reputation robbing banks, trains, and stagecoaches, and committing other offenses throughout the Midwest .

After gaining national fame as an elusive criminal, Jesse James's illegal career came to an end in 1882 . He was betrayed by one of his own, Robert Ford , who had met with the governor of Missouri to make a deal and bring James down.

Jesse James lived only 34 years, but the wild story of his life is full of infamous acts that seem like something out of a movie. And here's a fun fact: his son, Jesse James Jr., starred in two silent films playing his father!

2

Billy the Kid

Image: rod m

Ever heard the name Henry McCarty ? Maybe the alias William H. Bonney? If the answer is "no," you probably recognize him by his nickname: Billy the Kid .

In addition to committing robberies and assaults, this 19th-century outlaw gained notoriety for his role in New Mexico's Lincoln County War. Billy, born in 1859 , was arrested several times throughout his life but consistently managed to escape. However, his luck ended in the 1880s.

In the year 1881 , to be exact, Billy the Kid was caught by Sheriff Pat Garrett. That same year, a few months after his last escape, he was struck down at the young age of 21 by Garrett.

3

Butch Cassidy

Image: The National Library of Norway

You've probably heard of the Wild Bunch , a gang that intimidated the American West during the late 19th and early 20th centuries . Often considered the most successful train robbery gang in history, its members were feared guys, but the most notorious was its leader: Butch Cassidy.

Cassidy, born in 1866 , started his criminal career very early. Many historical sources state that he committed his first minor crime—store robbery—when he was only 14 years old !

However, as with most outlaws, his luck ran out. Escaping the law, he traveled to Latin America. The tales say he was in Argentina and then Bolivia , where he met his end in a shootout in 1908 .

4

Sundance Kid

Image: Ady TeenagerInRO

Another iconic figure in Cassidy's gang was Harry Alonzo Longabaugh, more famously known as the Sundance Kid .

Born in 1867 , his distinctive nickname originated during his time in the Sundance, Wyoming, jail, where he landed for one of his early crimes, horse theft. Legend has it that the Sundance Kid was a man of many skills, known particularly for his talent for poker and his ability to escape the law.

The tales suggest that Longabaugh traveled with Cassidy to Bolivia, where he met the same fate as the gang leader. Another theory says that the Sundance Kid returned to the U.S. under another name and lived in a small town in Utah.

5

Black Bart

Image: Joanna Kosinska

While crime and poetry might seem like an unlikely pairing, the outlaw known as Black Bart managed to blend these two things very well.

Probably less famed than the other names on this list, Black Bart was born Charles E. Boles (or Bolton) in England in 1829 . However, he relocated to New York with his family when he was just a toddler.

Between 1875 and 1883, Boles is believed to have robbed about 28 stagecoaches in Northern California and southern Oregon. But one thing distinguished this outlaw: on several occasions, he left behind poems at the robbery sites!

6

Al Capone

Image: Ashim D’Silva

It might be hard to believe, but before Al Capone became synonymous with organized crime, he actually worked at a candy store ! Can you picture him among candies and lollipops?

Definitely one of the best-known gangsters of the Prohibition era , Al Capone was born in New York as Alphonse Gabriel Capone in 1899 . Born to Italian immigrants, Capone moved to Chicago at a young age. By the 1920s , he had already made a name for himself among the city's criminals, smuggling and selling alcohol.

In 1931, his luck ran out, as he was sentenced to 11 years in federal prison for tax evasion. He was released in 1939 and passed away 8 years later.

7

Bonnie and Clyde

Image: Tengyart

Some say love's power knows no bounds, and the story of this couple seems to prove this.

Bonnie Elizabeth Parker and Clyde Chestnut "Champion" Barrow, known worldwide as Bonnie and Clyde , were two outlaws who committed a wide range of crimes across states such as Oklahoma, Texas, and Missouri during the Great Depression era . Literally partners in crime, they became popular icons over the years.

These two were recurring names in the headlines of their times, gaining notoriety for their robberies, both to banks and small stores. Together until the end, Bonnie and Clyde were fatally wounded in a police ambush in 1934 , when they were still very young. At the time, she was 23 and he was 25.

8

John Dillinger

Image: Tim Evans

John Dillinger , a mobster born in 1903 , led what was known as "the Dillinger Gang." During the Great Depression , Dillinger and his crew demonstrated their criminal prowess, accused of robbing more than 24 banks !

In 1934, John Dillinger became the first person to be declared "Public Enemy Number One" by the FBI. He was imprisoned multiple times throughout his life and, as the stories go, managed to escape jail twice using fake weapons made out of wood!

After a final attempt to escape, the criminal was gunned down by the authorities at the age of 31 as he exited the Biograph Theater in Chicago.

9

Pretty Boy Floyd

Image: Pepi Stojanovski

During the turbulent Great Depression era, a couple of outlaws were not only robbing banks and trains but also the national spotlight. Among them was Pretty Boy Floyd , born Charles Arthur Floyd in 1904 .

Floyd, who operated in the Western and Central U.S. , wasn't seen as a villain by many. Why? Besides robbing banks , he also used to destroy mortgage documents , something that helped many people, relieving them of their debts. Far from the sloppy appearance of many criminals, Floyd had a clean-cut and youthful look, which earned him his characteristic nickname .

His life met an end in his 30s in a shootout with the Bureau of Investigation's agents in Ohio.

10

John Gotti

Image: Jacob Spence

Known as " Teflon Don " for his slippery ability to evade justice, John Gotti was born on October 27, 1940 , in The Bronx, New York. He's widely considered one of the most dangerous crime bosses in U.S. history.

Known for his charisma and trademark hairspray look , Gotti began his life of crime when he was still a teenager. By the mid-1980s, he had become the head of the Gambino Crime Family, and throughout his life, he was accused of multiple crimes of varying severity.

Despite evading convictions many times, he was finally convicted in 1992 . He passed away ten years later while still in prison.

1

The Plaza Hotel, New York

Image: Harri Nieminen

The Plaza Hotel, located at Fifth Avenue and Central Park South in Manhattan, New York City, is one of the most famous hotels in the world . It was opened in 1907 and designated a National Historic Landmark in 1986. Known for its luxury, iconic architecture, and high-society clientele, it has a past of having hosted figures like F. Scott Fitzgerald (who immortalized it in The Great Gatsby ) and Marilyn Monroe.

The Plaza’s featuring in several films has gained international fame. Scenes from Home Alone 2 or North by Northwest , and Eloise at the Plaza have the iconic backdrop of the hotel as its setting. It was also the lodging The Beatles chose for their first stay in the U.S. in 1964, but the hullabaloo of the fan craze was such that they chose lower-profile hotels for their subsequent visits.

2

Willard InterContinental, Washington

Image: Pixabay

Just two blocks from the White House in Washington, D.C. stands the Willard InterContinental. The same site has hosted a hotel since 1818, but the current building opened in 1901. It’s nicknamed the "Residence of Presidents" because nearly every U.S. president since Franklin Pierce has either stayed there or visited.

Its notable location granted the Willard other historical honors. For example, it’s said that President Ulysses S. Grant enjoyed spending calm moments in the opulent hotel’s lobby, but there he would be crowded by people who would seek favors or influence policy decisions. He coined the term "lobbyists" to refer to them. It was also where Dr. Martin Luther King Jr. completed his famous "I Have a Dream" speech before delivering it.

3

The Stanley Hotel, Colorado

Image: Luke Scarpino

If the sight of The Stanley Hotel makes you a bit uncomfortable, you are not alone. It is the very building that inspired Stephen King to write The Shining (1977). After staying there in the 1970s, King had a dream about his son running through the hotel’s halls, which led to the idea of the haunted Overlook Hotel featured in the book. Though the Stanley itself is not the setting for either the novel or Stanley Kubrick’s film adaptation, the myth surrounding this 1909 hotel has made it a hotspot for paranormal tourism.

The hotel is said to be haunted, after all. Reports of mysterious piano music, flickering lights, and strange apparitions keep drawing fans to it. Room 217, where Stephen King stayed, is the most famous of these "haunted" rooms . Guests and staff have reported seeing Mrs. Wilson, a housekeeper who worked at the hotel in the early 1900s, tidying up the room.

4

The Bellagio, Las Vegas

Image: Antonio Janeski

Las Vegas Strip, an area bright enough to be visible from space, holds in its heart many impressive hotels. But The Bellagio probably takes the crown. It was the most expensive hotel ever constructed when it opened in 1998, having cost $1.6 billion. Its facade features the famous Fountains of Bellagio , which perform water shows synchronized to music and lights daily.

In its boastful style, the hotel also has an upscale casino, five-star restaurants, and the Bellagio Gallery of Fine Art , which features rotating expositions but once featured works from Picasso, Monet, and van Gogh, among others. The hotel has also, since its opening, been home to Cirque du Soleil’s show "O", aquatic-themed and occurring in and around an on-stage pool.

5

Palace Hotel, San Francisco

Image: Pixabay

San Francisco’s Palace Hotel opened in 1875, so it was already around for the 1906 earthquake, which damaged it and demanded renovations. But it always remained a stunning hotel, featuring a grand lobby with a stained-glass dome and chandeliers. Many prominent guests walked its halls, including Mark Twain, Frank Sinatra, and Queen Elizabeth II .

In its inauguration in the 19th century, it was the largest hotel in the world. 19 presidents of the U.S. have been esteemed visitors, and most notably President Woodrow Wilson hosted luncheons at the Palace Hotel when he was building support for the Treaty of Versailles to end World War I.

6

Crescent Hotel and Spa, Arkansas

Image: Evgenia Basyrova

Eureka Springs’ Crescent Hotel and Spa is a top tier in many lists of "most haunted hotels." Its old age and eerie story are enough to earn it this honor. Opened in 1886, the Victorian in the 1930s functioned as a hospital for treating cancer patients. It is said that a con doctor called Norman Baker took patients in to allegedly cure them, but caused some untreated guests to pass away as a result.

Legend has it, that one of his patients, as well as Baker, still haunts the rooms of Crescent Hotel. Some TV shows, like "Ghost Hunters" and "Ghost Adventures", have explored the venue. Of course, the hotel also offers ghost tours .

7

Jekyll Island Club Resort, Georgia

Image: Pixabay

The Jekyll Island Club Resort is located on Jekyll Island, one of the barrier islands off the coast of Georgia. It was founded in 1886 as a winter retreat for some of America’s wealthiest families , including the Morgans, Rockefellers, and Pulitzers. This earned the place the reputation for being one of the most exclusive and prestigious social clubs in American history.

The hotel houses the Historic Jekyll Island Museum, which showcases the island’s past in the Gilded Age. To this day it is still praised for its beautiful natural landscapes and trails. The island offers stunning natural surroundings , and the hotel prides itself on its commitment to preserving its environment.

8

Omni Parker House, Boston

Image: Patrick Foreman

The Omni Parker House from Boston, Massachusetts, opened in 1855 as the "Parker House", and is now the oldest continuously operating hotel in the United States. It has hosted many notable guests, like Charles Dickens, Mark Twain, and John F. Kennedy. Babe Ruth and other baseball greats frequented its restaurant. The place also holds the separate honor of being the birthplace of the Boston Cream Pie , a chocolate-and-cream dessert that now symbolizes Massachusetts.

Of course, a hotel that is 169 years old cannot be free from haunted allegations. Reports of ghostly apparitions and unexplained noises are common for the Omni Parker House, particularly around its historic rooms.

9

Chateau Marmont, Hollywood

Image: Edgar Colomba

Chateau Marmont, from West Hollywood, California, has been operating since its opening in 1929. It was designed in a French Gothic style, inspired by the Château d'Amboise in France. Its location has granted it a long history of receiving a large celebrity clientele and fame associated with glamour, legend, and scandal.

James Dean and Judy Garland would find refuge in the hotel, which soon became known as a haven for stars for its strict privacy policies . The Chateau has also appeared in Hollywood self-referential films like The Player or A Star is Born .

10

Hotel del Coronado, Coronado Island

Image: Donhu Rickerby

The Hotel del Coronado, a.k.a. "The Del," is a historic beachfront hotel that opened in 1888. Its grand exterior with red-and-white striped roofs is easily recognizable, and it has been declared a National Historic Landmark. Many dignitaries have visited it, like Richard Nixon, Princess Grace of Monaco, and Thomas Edison, although, opposing popular belief, he had nothing to do with the early installation of electricity that the hotel boasted.

If you’ve seen Some Like It Hot , featuring Marilyn Monroe , you have spied places in the hotel. Many scenes were filmed there, which made it appear as the "Seminole Ritz Hotel" in Miami in the film.