1

Harriet Tubman secretly worked as a Union spy

Most Americans know Harriet Tubman for her leadership of the Underground Railroad, but during the Civil War, she also became a Union scout and spy in South Carolina. Working with Colonel James Montgomery, Tubman gathered intelligence from enslaved people living behind Confederate lines near the Combahee River .

In June 1863, Tubman helped lead the Combahee River Raid, guiding Union gunboats through Confederate waters filled with hidden mines. The operation freed more than 700 enslaved people and made Tubman the first woman known to lead a major U.S. military mission.

2

Julia Child worked for the U.S. intelligence agency

Before becoming television’s most famous chef, Julia Child joined the Office of Strategic Services, or OSS, in 1942 during World War II. The OSS later evolved into the CIA. Too tall to enlist in the Women’s Army Corps, Child instead classified files and overseas communications in Asia.

One of her strangest assignments involved helping researchers develop shark repellent for Navy explosives and emergency rescue kits . The repellent used copper acetate and black dye to create an odor similar to a dead shark.

3

Benjamin Franklin conducted unofficial spy work in Europe

Benjamin Franklin was more than a scientist and Founding Father. During the American Revolution, he quietly acted as an intelligence organizer while serving as ambassador to France beginning in 1776 . Franklin cultivated secret alliances, intercepted information, and used coded correspondence to support the colonies’ fight against Britain.

Operating from Paris, Franklin built relationships with French officials and helped persuade France to support the American cause with money, troops, and naval power. Historians consider his diplomatic intelligence efforts essential to the American victory at Yorktown in 1781 and eventual independence.

4

Louisa May Alcott published thrillers under another name

Louisa May Alcott became a literary icon after publishing Little Women in 1868, but few readers knew that she had already written sensational thrillers under the pen name "A.M. Barnard." These stories featured revenge, hidden identities, forbidden romance, and dramatic crime plots that shocked Victorian audiences.

Alcott used a pseudonym because publishers often expected women writers to produce respectable domestic fiction. Many of her darker stories remained forgotten until scholars rediscovered them in the 1940s. Today, titles like Behind a Mask reveal a far more rebellious side of the beloved author.

5

Maya Angelou worked as San Francisco’s first black female cable car conductor

Long before becoming a celebrated poet and author, Maya Angelou made history in San Francisco during the 1940s. At only 16 years old, she applied repeatedly for a conductor job on the city’s cable cars after seeing an advertisement that excluded Black applicants .

Angelou refused to give up despite repeated rejection. She eventually became San Francisco’s first Black female cable car conductor in 1944. Years later, she described proudly wearing the blue uniform while working long shifts across the city before launching her writing and civil rights careers.

6

Dr. Seuss created classified wartime propaganda films

Before writing Green Eggs and Ham and The Cat in the Hat , Theodor Geisel, better known as Dr. Seuss, worked on wartime propaganda during World War II. Between 1943 and 1945, he joined director Frank Capra’s Signal Corps unit to produce military training films for American soldiers .

Geisel also drew political cartoons supporting the Allied war effort and criticizing fascism. Some of his films were classified during the war because they contained military training material. His animated work helped explain battlefield strategy and morale issues to thousands of U.S. troops overseas.

7

Babe Ruth once played an entire game with a fever over 102 degrees

In 1925, Babe Ruth became seriously ill during spring training and collapsed while traveling by train . Newspapers nicknamed the incident "the bellyache heard around the world." Reports from the time described Ruth suffering from a fever above 102 degrees while still insisting on returning to baseball activities.

Despite his condition, Ruth’s determination became part of baseball legend. The illness hurt his performance during the 1925 season, when the New York Yankees finished seventh in the American League. Even so, Ruth rebounded quickly and helped lead the Yankees to championships in later years.

8

Harry Houdini worked with police departments

Harry Houdini’s famous escape acts fascinated police departments across America and Europe in the early 1900s. Officers regularly challenged him to escape from handcuffs, prison wagons, and locked jail cells. Houdini often invited local police to inspect restraints before his performances began.

Beyond entertainment, Houdini also worked closely with law enforcement to expose fraudulent mediums and fake spiritualists during the 1920s . Using his knowledge of locks, hidden compartments, and deception, he publicly demonstrated how many supposed supernatural tricks were actually carefully staged illusions.

9

Frank Lloyd Wright hid a private apartment inside one of his buildings

Architect Frank Lloyd Wright secretly maintained a private apartment inside his famous Oak Park Studio near Chicago, Illinois. Built in the 1890s, the studio served as both his workplace and personal retreat while he designed many of his early Prairie-style homes across the Midwest.

The hidden living quarters allowed Wright to work late into the night and host select guests away from public attention. The building itself became one of the most important centers of American architecture, producing groundbreaking residential designs that influenced modern architecture around the world.

10

Muhammad Ali quietly funded humanitarian causes for years

Muhammad Ali’s boxing fame often overshadowed his enormous charitable work. For decades, Ali quietly donated money to hospitals, food programs, children’s charities, and international humanitarian efforts . Friends and family later revealed that many of his contributions were intentionally kept private.

In 1990, Ali traveled to Iraq during tensions leading up to the Gulf War and helped secure the release of 15 American hostages. He also supported global relief organizations and Parkinson’s disease research after his own diagnosis. In 2005, President George W. Bush awarded Ali the Presidential Medal of Freedom.

1

Empire State Building

Image: Afif Ramdhasuma

We’ll begin with what’s perhaps the most famous skyscraper in "The City That Never Sleeps". The Empire State Building speaks to the magnificence and grandeur of New York City: After all, it is named after the State of New York’s official nickname, "The Empire State".

At the time of its construction, the Empire State Building was the tallest building in the world, a title held for almost 40 years. Its exquisite Art Deco design and innovative architecture have turned it into an instantly recognizable icon. Perhaps more famously, it has been featured in unforgettable pictures like "Sleepless in Seattle" and "King Kong". Be honest: Whenever you see a picture of this building, can’t you almost see a humongous ape perched atop its antenna?

2

Flatiron Building

Image: Vidar Nordli-Mathisen

For many, the most remarkable feature of this iconic building is its unusual name, which comes from its also rather unusual shape. The Flatiron is considered a New York City institution, and its history is almost as inspiring as its groundbreaking design.

In its early years, the Flatiron was known by the derisive nickname "Burnham's Folly", since detractors believed that architect Daniel Burnham’s design was a laughable idea. History would prove Burnham right though, since the Flatiron is still one of the most instantly recognizable skyscrapers in the world.

3

Willis Tower

Image: Gardhy Granados

For any Chicagoan who might be reading this, we know that you probably still call this building the "Sears Tower", but we thought it would be appropriate to include the official new name of this iconic skyscraper. Located in the heart of the "Loop", the Willis Tower is a 110-story, 1,451-foot building that has truly earned its place in Chicago’s skyline.

Since its opening in 1973, Willis Tower has proudly held the title of the world’s tallest building for close to 25 years. Regardless, this juggernaut is still an American landmark and one of Chicago’s most visited tourist attractions.

4

Transamerica Pyramid

Image: Chris Leipelt

While most pictures of San Francisco’s skyline are usually dominated by the Golden Gate Bridge, visitors of "The City by the Bay" are frequently dazzled by this unusual yet breathtaking building. Completed in 1972, the Transamerica Pyramid was San Francisco’s tallest building until 2018, when it was surpassed by the Salesforce Tower.

Without a doubt, the most striking aspect of this building is its groundbreaking design: Just like San Francisco’s carefree spirit of independence, this building seems effortlessly innovative. It has been compared to other revolutionary designs, most notably to "the Shard" building in London.

5

Columbia Center

Image: Anthony Alexander

Formerly known as "the Bank of America Tower" (or BOAT for short), the Columbia Center was constructed in downtown Seattle in the early ‘80s: At the time, this imposing black skyscraper was the highest building on the West Coast. While most of this skyscraper is leased for private usage, it does house the highest public viewing area west of the Mississippi River.

The Columbia Center’s design produces a rather interesting effect: Since the building is composed of 3 separate segments joined by 2 setbacks, viewers from the street might believe the Columbia Center is made from 3 different towers set side to side.

6

The Chrysler Building

Image: Anthony Fomin

As you probably expected, many iconic skyscrapers from "The City That Never Sleeps" will be featured in this article. The Chrysler Building is an art-deco masterpiece located at the intersection of 42nd Street and Lexington Avenue, which holds the distinction of being the world’s very first supertall skyscraper.

This building was commissioned by (and named after) Walter Chrysler, head of the Chrysler Corporation, and its construction was marked by a friendly competition with the Empire State Building for the title of the world’s tallest building. In that sense, the Chrysler Building’s remarkable 1,046 feet height gave it this impressive title, albeit only for 11 months.

7

Wells Fargo Plaza

Image: Franky Magana

If you ever find yourself taking a stroll through Downtown Houston, you’ll definitely come across a gorgeous all-glass skyscraper. You can’t miss it: After all, the Wells Fargo Plaza is the tallest all-glass building in the entire Western Hemisphere, standing at an impressive 992 feet.

This skyscraper was formerly known as the Allied Bank Plaza and in, 1988, it was renamed to the First Interstate Bank Plaza. However, when in 1996 First Interstate Bancorp was bought by Wells Fargo, this skyscraper changed its name once again to the Wells Fargo Plaza we all know.

8

John Hancock Center

Image: Jonathan J. Castellon

Founding Father John Hancock truly deserves all the praise it can receive from the American people, so it stands to reason that he should have his name honored by a 1,128-foot supertall skyscraper. Located in the iconic "Magnificent Mile", the John Hancock Center was for a while the tallest building in Chicago, surpassed by the previously mentioned Willis Tower.

This skyscraper was completed in 1969 and it has remained a Chicago staple ever since. It houses several restaurants and offices, as well as approximately 700 condominiums. Interestingly, the John Hancock Center is the background on which the 1988 horror film "Poltergeist III" takes place: Posters for this film featured this skyscraper, with a menacing lighting bolt crossing the night sky behind it.

9

Bank of America Plaza

Image: Luis Negron

Just like the Empire State and the Chrysler buildings, the Bank of America Plaza is another wonderful example of Art Deco architecture located between Midtown and Downtown Atlanta. This gorgeous skyscraper is instantly recognizable thanks to its unusual color palette, and it holds the distinction of being the tallest building of any U.S. state capital.

If you are lucky enough to visit "the City in a Forest", try to visit the Bank of America Plaza at night. You’ll quickly notice that the stunning golden spire at the top of the building (which is actually shaped like the Plaza itself) glows alongside a gorgeous pyramid of girders, in a lovely orange hue that tries to resemble old street lights.

10

Home Insurance Building

Image: Александр Македонский

We’ll end this article by honoring an iconic skyscraper that, while it is not still standing, lives on in the proud history of our country. Standing at 138 feet, the Home Insurance Building might not seem remarkably tall by today's standards but, at the time of its construction in 1885, this Chicago historical landmark became the world’s very first skyscraper.

Due to a decrease in its occupancy, the Home Insurance Building was demolished in 1931, alongside 5 other buildings, to make way for the site on which the Field Building now stands. However, this landmark’s legacy still stands, earning its well-deserved place in history as the father of the skyscraper.

1

Harriet Tubman secretly worked as a Union spy

Most Americans know Harriet Tubman for her leadership of the Underground Railroad, but during the Civil War, she also became a Union scout and spy in South Carolina. Working with Colonel James Montgomery, Tubman gathered intelligence from enslaved people living behind Confederate lines near the Combahee River .

In June 1863, Tubman helped lead the Combahee River Raid, guiding Union gunboats through Confederate waters filled with hidden mines. The operation freed more than 700 enslaved people and made Tubman the first woman known to lead a major U.S. military mission.

2

Julia Child worked for the U.S. intelligence agency

Before becoming television’s most famous chef, Julia Child joined the Office of Strategic Services, or OSS, in 1942 during World War II. The OSS later evolved into the CIA. Too tall to enlist in the Women’s Army Corps, Child instead classified files and overseas communications in Asia.

One of her strangest assignments involved helping researchers develop shark repellent for Navy explosives and emergency rescue kits . The repellent used copper acetate and black dye to create an odor similar to a dead shark.

3

Benjamin Franklin conducted unofficial spy work in Europe

Benjamin Franklin was more than a scientist and Founding Father. During the American Revolution, he quietly acted as an intelligence organizer while serving as ambassador to France beginning in 1776 . Franklin cultivated secret alliances, intercepted information, and used coded correspondence to support the colonies’ fight against Britain.

Operating from Paris, Franklin built relationships with French officials and helped persuade France to support the American cause with money, troops, and naval power. Historians consider his diplomatic intelligence efforts essential to the American victory at Yorktown in 1781 and eventual independence.

4

Louisa May Alcott published thrillers under another name

Louisa May Alcott became a literary icon after publishing Little Women in 1868, but few readers knew that she had already written sensational thrillers under the pen name "A.M. Barnard." These stories featured revenge, hidden identities, forbidden romance, and dramatic crime plots that shocked Victorian audiences.

Alcott used a pseudonym because publishers often expected women writers to produce respectable domestic fiction. Many of her darker stories remained forgotten until scholars rediscovered them in the 1940s. Today, titles like Behind a Mask reveal a far more rebellious side of the beloved author.

5

Maya Angelou worked as San Francisco’s first black female cable car conductor

Long before becoming a celebrated poet and author, Maya Angelou made history in San Francisco during the 1940s. At only 16 years old, she applied repeatedly for a conductor job on the city’s cable cars after seeing an advertisement that excluded Black applicants .

Angelou refused to give up despite repeated rejection. She eventually became San Francisco’s first Black female cable car conductor in 1944. Years later, she described proudly wearing the blue uniform while working long shifts across the city before launching her writing and civil rights careers.

6

Dr. Seuss created classified wartime propaganda films

Before writing Green Eggs and Ham and The Cat in the Hat , Theodor Geisel, better known as Dr. Seuss, worked on wartime propaganda during World War II. Between 1943 and 1945, he joined director Frank Capra’s Signal Corps unit to produce military training films for American soldiers .

Geisel also drew political cartoons supporting the Allied war effort and criticizing fascism. Some of his films were classified during the war because they contained military training material. His animated work helped explain battlefield strategy and morale issues to thousands of U.S. troops overseas.

7

Babe Ruth once played an entire game with a fever over 102 degrees

In 1925, Babe Ruth became seriously ill during spring training and collapsed while traveling by train . Newspapers nicknamed the incident "the bellyache heard around the world." Reports from the time described Ruth suffering from a fever above 102 degrees while still insisting on returning to baseball activities.

Despite his condition, Ruth’s determination became part of baseball legend. The illness hurt his performance during the 1925 season, when the New York Yankees finished seventh in the American League. Even so, Ruth rebounded quickly and helped lead the Yankees to championships in later years.

8

Harry Houdini worked with police departments

Harry Houdini’s famous escape acts fascinated police departments across America and Europe in the early 1900s. Officers regularly challenged him to escape from handcuffs, prison wagons, and locked jail cells. Houdini often invited local police to inspect restraints before his performances began.

Beyond entertainment, Houdini also worked closely with law enforcement to expose fraudulent mediums and fake spiritualists during the 1920s . Using his knowledge of locks, hidden compartments, and deception, he publicly demonstrated how many supposed supernatural tricks were actually carefully staged illusions.

9

Frank Lloyd Wright hid a private apartment inside one of his buildings

Architect Frank Lloyd Wright secretly maintained a private apartment inside his famous Oak Park Studio near Chicago, Illinois. Built in the 1890s, the studio served as both his workplace and personal retreat while he designed many of his early Prairie-style homes across the Midwest.

The hidden living quarters allowed Wright to work late into the night and host select guests away from public attention. The building itself became one of the most important centers of American architecture, producing groundbreaking residential designs that influenced modern architecture around the world.

10

Muhammad Ali quietly funded humanitarian causes for years

Muhammad Ali’s boxing fame often overshadowed his enormous charitable work. For decades, Ali quietly donated money to hospitals, food programs, children’s charities, and international humanitarian efforts . Friends and family later revealed that many of his contributions were intentionally kept private.

In 1990, Ali traveled to Iraq during tensions leading up to the Gulf War and helped secure the release of 15 American hostages. He also supported global relief organizations and Parkinson’s disease research after his own diagnosis. In 2005, President George W. Bush awarded Ali the Presidential Medal of Freedom.