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

Statue of Liberty

Image: Pierre Blaché

Location: New York City, New York

The iconic symbol of freedom and democracy, Lady Liberty stands tall on Liberty Island in New York Harbor. A fraternal gift from France in 1886, she welcomed immigrants and visitors to the United States for over a century with her torch held high , representing enlightenment and hope.

Originally, it was a brownish copper color, but after a few years of exposure to the elements, its iconic green patina—caused by the oxidation of its copper surface—began to spread. Also, did you know that her full name is actually "La Liberté éclairant le monde" , French for "Liberty Enlightening the World"?

2

Mount Rushmore

Image: John Bakator

Location: Keystone, South Dakota

Carved into the granite face of the Black Hills, Mount Rushmore features the colossal visages of four revered American presidents: George Washington, Thomas Jefferson, Theodore Roosevelt, and Abraham Lincoln.

Although the monumental sculpture was never finished due to lack of funding (the original vision of sculptor Gutzon Borglum was that each president would be depicted from head to waist), it is still one of the most enduring symbols of the nation's founding principles and leadership.

3

Lincoln Memorial

Image: Kelli Dougal

Location: Washington D.C.

Honoring the 16th President of the United States, the Lincoln Memorial stands as a tribute to Abraham Lincoln's enduring legacy and his role in preserving the Union during the Civil War. An example of neoclassical architecture, it is built in the form of a classical temple , and the massive marble statue of Lincoln seated solemnly commands reverence upon entrance.

The memorial serves as a symbolic center for civil rights and has been the site of many historic speeches , most notably Martin Luther King Jr.'s "I Have a Dream" speech in 1963.

4

Gateway Arch

Image: Chris Hardy

Location: St. Louis, Missouri

Considered by some to be the tallest human-made monument in the Western Hemisphere - and the tallest arch in the world - the Gateway Arch soars 630 feet above the Mississippi River, a tribute to America's westward expansion and the pioneering spirit of its people.

Made of stainless steel with reinforced concrete infill, the structure is built to withstand earthquakes and winds up to 150 miles per hour. Inside, the arch is hollow and contains a tram system that takes visitors to an observation deck at the top.

5

Washington Monument

Image: Andy He

Location: Washington D.C.

Dedicated to the nation's first President, George Washington, this towering obelisk stands at 555 feet, making it one of the tallest stone structures in the world - and for a brief period of time between 1884 and 1889, before the construction of the Eiffel Tower, it actually was the world's tallest structure.

Its cornerstone, a 24,500-pound marble block, was specially hollowed to hold a number of memorabilia , including items associated with the monument, George Washington, and various benevolent societies.

6

USS Arizona Memorial

Image: Kirby Yardley

Location: Pearl Harbor, Hawaii

Built over the sunken remains of the USS Arizona, this memorial pays homage to the lives lost during the attack on Pearl Harbor on December 7, 1941. Only accessible by boat, the solemn structure sits just above the sunken battleship without touching it , preserving the original wreckage intact.

To this day, drops of oil occasionally leak from the ship’s deteriorating oil tanks , forming oil slicks on the water’s surface that are often referred to as "the tears of the Arizona."

7

Crazy Horse Memorial

Image: Lauren Lopes

Location: Crazy Horse, South Dakota

A colossal endeavor still in progress, the Crazy Horse Memorial is a heartfelt tribute to the Lakota leader Crazy Horse , intended to honor the culture, tradition, and resilience of Native Americans.

When it is finally completed, it will be the largest sculpture in the world , standing at 563 feet high and 641 feet long.

8

Hoover Dam

Image: Ryan Thorpe

Location: Nevada/Arizona border

Although not technically a monument, the Hoover Dam undeniably stands as a testament to American ingenuity and resourcefulness. Completed in 1936, it was originally named Boulder Dam , but the association with President Herbert Hoover endured, leading to its eventual renaming in his honor.

Spanning the Colorado River between Nevada and Arizona, the Hoover Dam is a monumental feat of engineering and a vital source of hydroelectric power and water for the Southwest United States.

9

Bunker Hill Monument

Image: Siddharth Mallya

Location: Charlestown, Massachusetts

Standing tall on Breed's Hill in Charlestown, Massachusetts, the Bunker Hill Monument commemorates the Battle of Bunker Hill , one of the early clashes in the American Revolutionary War.

Constructed between 1825 and 1843, the granite obelisk rises 221 feet and is accompanied by a statue of Col. William Prescott , a celebrated commander and hero of the Revolutionary War. Prior to the construction of the Washington Monument, it was the nation's largest-scale memorial.

10

Golden Gate Bridge

Image: Leo_Visions

Location: San Francisco, California

Spanning the Golden Gate Strait and connecting San Francisco to Marin County, the Golden Gate Bridge is an enduring symbol of American engineering and inventiveness. Opened in 1937, the iconic suspension bridge stretches 1.7 miles, and the main cables that support the weight of the roadway are made out of over 80,000 miles of galvanized steel wire.

Its distinctive orange hue, known as International Orange , was carefully chosen by consulting architect Irving Morrow to both complement the natural surroundings and enhance visibility in the frequent foggy conditions of the bay.

1

Chicken Tetrazzini, California

Image: Lampos Aritonang

California is famous for several dishes, including sushi, avocadoes, and many more but the Chicken Tetrazzini is also a very popular and delicious local dish. Named for an Italian-born opera star who lived in San Francisco, the dish involves thin sliced chicken served with mushrooms in a cream-based sauce flavored with white wine .

The dish was supposedly invented in the early 1900s by Ernest Arbogast, the chef at the Palace Hotel in San Francisco, where Luisa Tetrazzini made her American debut at the Tivoli as Gilda in Rigoletto in 1905.

2

Scrapple, Delaware

Image: Martinet Sinan

While the name may not sound all that appealing, the flavor makes up for it. This meat loaf is made of cornmeal, flour, seasonings, and pork scraps , which gives it its name. It’s then sliced thinly and pan-fried before serving.

As the story goes, this dish owes its existence to the Pennsylvania Dutch not wanting to waste their meat trimmings. Locals claim that it makes for an excellent snack or breakfast addition.

3

Italian Beef, Illinois

Image: Farhad Ibrahimzade

It sounds like beef, but it is a beef sandwich, actually. This deliciousness is made by slow-cooking beef, slicing it thinly, and placing it into a white bread roll with a local hot pickled pepper relish or roasted sweet peppers.

The origin of this dish is informed by Chicago’s meat packing history, as it was made quickly as a lunch item for workers with ingredients at hand.

4

Bierock, Kansas

Image: Jeremias Ybañez

Quite similar to Argentinean "empanadas", bierock are small meat pies created in Kansas by German immigrants in the late 1800s. They are typically stuffed with cabbage, ground beef, and onion but many other flavors can be found as the format lends itself to creativity and can be stuffed with just about anything.

These savory treats are common among the German community and it was brought to the United States in the 1870s by German Russian Mennonite immigrants.

5

Toasted Ravioli, Missouri

Image: Lorenzo Tomassetti

A local specialty from St. Louis, "toasted" ravioli are actually deep-fried and meant to be dipped in sauce and eaten with your hands . They function as an appetizer, entrée, and snack. As the legend goes, in the early 1940s, a raviolo was accidentally dropped into the fryer by a chef. Apparently, someone thought that this happy accident tasted good because, shortly thereafter, the item began appearing on menus across The Hill.

6

Cider Doughnuts, New Hampshire

Image: Pere Jurado

New Hampshire cider doughnuts get their flavor from cinnamon, nutmeg, and apple cider used in the batter. These are cakey donuts, perfect for snacking during fall, and are a harvest tradition sometimes sold at cider mills. They are often paired with apple cider and may be covered with cinnamon and/or granulated sugar.

7

Kase Knoephla, North Dakota

Image: Frank Zhang

These hard-to-pronounce cheese buttons are a form of dumplings of German origin, a nod to the settlers who immigrated to the area. They’re stuffed with a cottage cheese mixture and served with sauteed onions, cheese, and sour cream .

These treats have some similarities with Italian ricotta ravioli. The recipe for the noodle dough is exactly the same as a common recipe for pasta, and the recipe for the cheese is similar to at least one version of ricotta.

8

Pepperoni Rolls, West Virginia

Image: Jez Timms

Imagine a soft white bread roll stuffed with slices of pepperoni and you will be picturing a pepperoni roll. This dish can attribute its existence to the local coal mining industry, as it was created by an Italian baker so miners would have a no-fuss lunch they could pack for work.

During baking, the fats in the pepperoni melt, resulting in a spicy oil suffusing into the bread. Pepperoni rolls are typically eaten for lunch or breakfast, either unheated or slightly warmed.

9

Conch fritters, Florida

Image: Anshu A

You can skip this one if you are not into snails but if you are, by all means, read on. Conch are large sea snails native to the Florida Keys, the Bahamas, and surrounding regions battered and fried as to become a deliciously salty and savory snack.

This dish can be eaten on its own, or fried with chips, or in a seafood salad. But the fritters are perfect for sharing.

10

Ham Balls, Iowa

Image: Сергей Орловский

It should come as no surprise that a state with so many pork farms has its own version of a metaball but with ham. Or at least partially, since ham balls have a mixture of ground meats: ground ham, ground beef, and ground pork . Ham is a cured cut of pork with a smoky quality, it contains a different flavor than ground pork alone.

While these three types of meat together might sound like an odd combination, the mixture results in a flavorful and perfectly textured meatball. Also, to differentiate even further from the classic meatballs, ham balls use graham cracker crumbs instead of breadcrumbs.