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.

1

What are bills made of?

Unlike other currencies, dollar bills are not made of paper or plastic. U.S. dollar bills are made from a special fabric blend composed of 75% cotton and 25% linen. This mix makes the bills extremely durable and resistant, and they can be folded about 4000 times before tearing.

2

What bills are valid?

Any U.S. dollar bill that was legally printed is valid, no matter how old, as American currency does not have an expiration date. While some bills might not be accepted by businesses of foreign exchange services due to their condition or if they are a discontinued version of the bill, the bills themselves are still valid, and American banks will accept them, though they might take them out of circulation.

3

American leaders

Five bills have a depiction of an American president. The exceptions are the $10 bill, with Alexander Hamilton on the front, and the $100 bill, with Benjamin Franklin. The $1 bill, depicting George Washington, is extremely symbolic: several elements are repeated 13 times as a nod to the thirteen colonies, and it showcases the Bald Eagle and the Eye of Providence as a sign of God watching over America.

4

A change in size

Did you know that dollar bills used to be so big that they were nicknamed "horse blankets"? Original dollar bills were 7.4 × 3.1 inches. In 1929, the Treasury Department reduced the size of bills to 6.14 × 2.61 inches to reduce production costs and materials. Old bills, though still valid, are worth much more as collector items.

5

Uniformity

Besides their value and design, all dollar bills have the same size (6.14 × 2.61 inches), color, and weight (1 gram) , which sets American currency apart from other countries where bills of different values are differentiated by size, color, or both. Why doesn’t the U.S. implement differences among bills? The cost of adapting vending machines, bank drawers, and ATMs to new bill sizes would cost billions of dollars.

6

Hard to copy

Originally, dollars were not green, but black. As time passed, green ink was favored, as it was cheap and did not fade as much as black. The new color also prevented people from using black-and-white cameras to create counterfeit money. Currently, dollar bills are predominantly green, but newer versions also include extra colors, such as pink, orange, or purple.

7

A $100,000 bill?

Have you ever seen a $500 or 1,000 dollar bill? What about a $100,000? Up until 1945, the U.S. Treasury printed $500, $1,000, $5,000, $10,000, and $100,000 notes , in addition to the values currently in use. These higher-value notes were mainly intended for bank and government use, but were sought by criminals as they made it easier to hide large amounts of money. Even though they were officially discontinued in 1969, these notes are still valid, though rare, and they have a high worth as collector's items.

8

No numbers

Unlike bills, American coins have different sizes and colors related to their value. Originally, gold, silver, and copper were used for coins, but modern coins are made of copper, zinc, or nickel. Besides their size and design, the value of each coin is printed in letters, not in numbers , alongside depictions of American presidents.

9

Liberty for all (the coins)

By law, all American coins must include six specific details : the word ‘Liberty’, the name of our country, the national motto "In God We Trust", the oldest American motto "E Pluribus Unum", the value of the coin, and the year. Each coin also includes a mint mark that shows where it was made: "P" for Philadelphia, "D" for Denver, "S" for San Francisco, and "W" for West Point.

10

A global currency

The American dollar is one of the most powerful currencies in the world, acting as a backbone for international trade and finances. It is estimated that two-thirds of the physical dollars in circulation are outside American territory. Besides the U.S. and its territories, eight sovereign nations have the U.S. dollar as their official currency, with several more accepting it as legal tender.

1

There's an unexplained billion-year gap

Look closely at the canyon walls, and you'll notice something strange: a clean, sharp line where ancient rock simply stops, and a much younger layer begins directly above it.

This geological puzzle is called the "Great Unconformity," and it represents over a billion years of rock layers that are simply absent , as though that stretch of time never happened. In some spots, rock dated 1.8 billion years old sits directly beneath rock that is only 520 million years old. Where did the missing billion years go?

The leading theory involves the violent breakup of an ancient supercontinent, but scientists are still piecing it together.

2

During the Cold War, it hid a nuclear fallout shelter

During the Cuban Missile Crisis in 1962, the U.S. government converted part of the Grand Canyon Caverns into a fallout shelter. This dry cave system, more than 200 feet underground, was stocked with enough food and water to sustain 2,000 people. Naturally, it was never occupied, and the supplies were never used.

The caverns have since been transformed into a tourist attraction, with organized tours winding through the same underground chambers that were once intended as a refuge from nuclear war. You can even book a night's stay there.

3

The Federal Aviation Administration was founded after a crash over the canyon

In 1956, two commercial passenger planes collided in midair over the eastern Grand Canyon, killing all 128 people on board both crafts. Rescue teams struggled to reach the wreckage deep inside the canyon, and the extreme heat of the crash had caused the planes' aluminum to fuse with the bedrock. There were no survivors.

The disaster exposed a terrifying truth: the U.S. air traffic control system was dangerously outdated, relying on pilots' visual estimates and rough guesswork from controllers , with no way to separate fast-moving aircraft from slow ones, or instrument-flying planes from those navigating by sight. Congress responded by passing legislation that created both the Federal Aviation Administration (FAA) and the National Transportation Safety Board.

4

A hoax suggested that an Egyptian civilization had lived there

In 1909, the Arizona Gazette reported that an explorer named G. E. Kinkaid had discovered a vast underground citadel inside the canyon, filled with artifacts linked to ancient Egyptian civilization. He even claimed the expedition had been funded by the Smithsonian.

This story described hieroglyphics on the walls, mummies in the chambers, and relics pointing to a direct connection with the Egypt of the pharaohs. It was incredibly detailed, and it was, of course, a hoax. No evidence for any of Kinkaid's claims ever surfaced.

5

Fewer than 100 people have ever hiked its full length

Among the few people who have completed the through-hike of the Grand Canyon is Jen Hogan, the first woman to accomplish it, finishing her journey in 2021–2022.

It’s a full 800-mile length below the rim. The route involves extreme heat, flash floods, near-impassable areas, and stretches with no water or trail whatsoever. Around 60 or 70 people have reportedly accomplished it. This makes it one of the most exclusive feats on Earth.

6

The Grand Canyon's rocks predate dinosaurs entirely

Visitors scanning the canyon walls for fossils are often surprised to learn they won't find any dinosaur bones here. The rock layers of the Grand Canyon are simply older than dinosaurs. This fact alone can be shocking: staring at its walls means staring at marine fossils from as far back as 1.2 billion years ago. Some of its caves hold the remains of ancient mammals. The canyon is a window into a world that existed long before the dinosaurs, when the land that is now Arizona lay beneath a shallow sea.

7

The park is bigger than Rhode Island

Numbers alone rarely capture the Grand Canyon's scale, so here's a different approach. Rhode Island covers about 1,214 square miles, and the Grand Canyon National Park spans 1,904 square miles.

The canyon's depth exceeds four Empire State Buildings (which is 1,454 feet) stacked on top of one another. That’s 6,093 feet at its deepest point.

8

But it's not the deepest canyon on Earth

For all its grandeur, the Grand Canyon does not hold the depth record. Pictured above, the Yarlung Tsangpo Grand Canyon in Tibet, China, plunges to 17,567 feet, which is nearly three times deeper. Carved by the Yarlung Tsangpo River as it cuts through the eastern Himalayas, that canyon is so remote and extreme that it remained largely uncharted until the late 20th century.

9

It is home to a pink rattlesnake found nowhere else on Earth

The Grand Canyon Pink Rattlesnake has a pinkish-red coloring that matches the canyon's own distinctive rock walls so closely that it's nearly invisible. It is found nowhere else in the world. Officially classified as Crotalus oreganus abyssus , it has darker diamond-shaped markings along its back that deepen the camouflage further.

10

There's a village at the bottom: Supai Village

For over 1,000 years, the remote village of Supai has been home to the Havasupai Tribe, the People of the Blue-Green Waters. It is located an eight-mile hike from the rim, but sits roughly 3,000 feet deep inside the Grand Canyon.

The U.S. Department of Agriculture has called it the most remote community in the contiguous United States, and it has no automobiles and no road access. The only ways in are on foot, by mule, or by helicopter. It is also the only place in the United States where the postal service still delivers mail by mule train.