1

A renovation project saved thousands of lives on 9/11

On September 11, 2001, American Airlines Flight 77 struck the Pentagon at 9:37 a.m., killing 189 people. Few people know this part: the death toll could have been much higher. But there was a renovation project underway at the time of the attacks.

The Pentagon’s five-sided structure is divided into five "wedges," and workers had been renovating them one at a time. Flight 77 struck the wedge that had just been completed. Of the 4,500 people who normally worked in that section, only about 800 had moved back in. Without the reinforced construction and the incomplete occupancy, experts believe the casualties would have been catastrophically higher.

2

The Cold War and the hot dog stand

In the middle of the Pentagon’s five-acre center courtyard once stood a modest hot dog stand. According to a Cold War legend (one still retold by official Pentagon tour guides on every public tour), between the 60s and the 80s, Soviet satellite images tracked large groups of high-ranking military officials converging on that small building at the same time every day.

Soviet intelligence reportedly concluded the structure must be the entrance to some underground bunker in America. In reality, all it did was sell lunch. In 2006, the original stand was torn down, and a sandwich shop was built in its place.

3

Its construction began on September 11th, exactly 60 years before the attack

Builders broke ground on the Pentagon on September 11, 1941. That was exactly 60 years to the day before the September 11, 2001, terrorist attacks that would strike the same building.

Construction had been ordered by Army Brigadier General Brehon Somervell, who wanted a permanent headquarters for the Defense Department to replace its then-17 scattered offices across Washington, D.C.

The project was extraordinarily ambitious: plans called for the world’s largest office building to be completed in just 16 months. In the end, the conception, design, and construction of the entire Pentagon building took a total of 15 months.

4

The same person oversaw its construction and the Manhattan Project

Colonel Leslie Groves of the Army Corps of Engineers took charge of Pentagon construction in August 1941. He worked six days a week and drove his team relentlessly, at one point employing more than 15,000 workers around the clock.

When the Pentagon was finished in January 1943, Groves was assigned to lead the Manhattan Project, America’s secret program to build the atomic bomb . His deputy, Captain Robert Furman, followed him into the Manhattan Project as chief of foreign intelligence. Together, the men who built the world’s largest office building went on to produce the weapon that ended World War II.

5

Why is it shaped like that?

The Pentagon’s iconic five-sided shape was the consequence of a geographic accident. The original site selected for the building, near Arlington Cemetery, **happened to be bordered on five sides by roads. **Architects designed the structure to fit those boundaries, producing a pentagonal floor plan. Then President Franklin D. Roosevelt intervened: worried the massive building would obstruct the view of Washington, D.C. from Arlington, he ordered the site moved to its current location along the Potomac River. But the five-sided design had already been drawn up, and nobody changed it.

6

It was the first desegregated building in Virginia

When the Pentagon was designed in 1941, segregation was the law in Virginia. Original plans called for doubled bathroom facilities: separate ones for Black and white employees, as required by Virginia statute. But President Roosevelt had signed Executive Order 8802 in June 1941, prohibiting racial discrimination in federal employment and government contracting.

As a federal building, the Pentagon was exempt from Virginia law. It became the only building in the state where segregation was not enforced. A fully desegregated federal workplace that opened in 1943. The doubled bathrooms were built anyway, as the plans were too far along to revise, but were never used as separately designated spaces.

7

Its construction was surprisingly frugal and incredibly fast

Ground broke on September 11, 1941, and construction finished on January 15, 1943, just 16 months later. More than 15,000 workers were on site around the clock. Wartime office shortages were so severe that employees moved into completed wings before the rest of the building was finished. Steel was too scarce to use extensively, so builders relied almost entirely on reinforced concrete. The 689,000 tons of sand and gravel required came directly from the nearby Potomac River, cutting transportation costs. The project was budgeted at $35 million, but the final bill was $63 million, which would translate to over $900 million in today’s dollars.

8

You can walk between its farthest points in only 7 minutes

The Pentagon is the world’s largest low-rise office building: 6.5 million square feet of space, which is three times the total floor area of the Empire State Building. Each of its five outer walls is 921 feet long. It has 7,754 windows and 17.5 miles of corridors. Approximately 26,000 military and civilian employees report for work there every day.

Despite that scale, the building’s concentric ring design is so efficient that it takes only about seven minutes to walk between its two farthest points.

9

The man who secretly lived inside its walls

During construction, Colonel Groves drove his deputy, Captain Robert Furman, so relentlessly that Furman rarely left the building. To cope, Furman had contractors build him a small, windowless apartment hidden inside the walls of the Army’s Ordnance Division. In this private room, he could sleep and shower without leaving the premises.

When construction ended and personnel dispersed, knowledge of the hidden room was never passed on to building management. Months later, when Furman returned to Washington on Manhattan Project intelligence business, he found the apartment undiscovered and exactly as he’d left it.

For over a year, he would slip back to the Pentagon, pop open a wall panel, spend the night, and emerge in the morning with his suitcase. He was finally caught in 1943 and forced to surrender the keys. It was never disclosed whether the secret apartment was maintained or eventually absorbed back into the official floor plans.

10

It houses over 30 restaurants, including everyone's favorite chains

The Pentagon feeds roughly 26,000 people a day, and its dining options read less like a military headquarters and more like a mall food court. The main Concourse Food Court, which opened in September 2009 and seats 875 people, is the largest of several dining areas.

Confirmed chains currently inside the building include McDonald’s, Five Guys, Subway, Popeyes, Starbucks (multiple locations), Dunkin’ (two locations), Panera Bread, Taco Bell, Panda Express, Baskin-Robbins, Potbelly, Jamba Juice, and Moe’s Southwest Grill, among others. The building also houses a CVS pharmacy, a florist, a jeweler, and a dry cleaner. In the summer of 2024, Potbelly became the first restaurant to open in the center courtyard. Yes, the very spot where the legendary Cold War hot dog stand once stood.

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.

1

Rachel Jackson: A "Bigamy" scandal (1820s)

In 1791, a young Andrew Jackson married Rachel Donelson. Both believed her first husband, Captain Lewis Robards, had successfully finalized their divorce. Apparently, Robards didn’t file the petition, making her marriage to Jackson technically bigamous. Once the divorce went through in 1794, they officially remarried.

During the 1828 presidential campaign, Jackson’s political opponents used this legal mistake against him. They branded Rachel a loose woman and a bigamist in pamphlets scattered across the country. The intense public shaming broke her spirit and deteriorated her health. She suffered a fatal heart attack just days before Jackson’s inauguration, leaving the newly elected president heartbroken and extremely bitter toward his political rivals for the rest of his life.

2

Grover Cleveland’s illegitimate child (1884)

Decades later, another personal bombshell rocked another presidential race. Republican opponents revealed that Democratic nominee Grover Cleveland, a bachelor praised for his integrity, had fathered a child out of wedlock with a widow called Maria Halpin ten years before.

Republicans paraded through the streets chanting, "Ma, Ma, where’s my Pa?" Instead of denying the affair or trying to bury it, Cleveland instructed his campaign managers to do something radical: "Tell the truth." He admitted to supporting the child financially. His honesty caught his opponents off guard and won over voters who were tired of such dirty political tactics.

3

The Crédit Mobilier scandal (1872)

This particular scandal stands as one of the most shameless corporate schemes of the Gilded Age. Stockholders of the Union Pacific Railroad formed a fraudulent construction company called Crédit Mobilier of America . Then, they hired themselves to build the transcontinental railroad at inflated prices, pocketing tens of millions of dollars in federal subsidies.

To prevent Congress from investigating their profit margins, Congressman Oakes Ames distributed discounted shares of the company’s stock to influential politicians, including Vice President Schuyler Colfax. When the press exposed the story in 1872, the revelation that lawmakers were bribing themselves tarnished the legacy of the Ulysses S. Grant administration.

4

The Whiskey Ring scandal (1875)

A few years later, another financial disaster hit the Grant administration. The Whiskey Ring was a widespread conspiracy involving distillers, distributors, and internal federal tax officials who stole millions of dollars in liquor taxes.

Using a complex web of bribes and falsified records, the ring defrauded the U.S. Treasury. The scandal reached the inner circle of power when President Grant’s own private secretary, Orville Babcock, was indicted as a ringleader. Grant provided a deposition in his secretary’s defense. While this saved Babcock from prison, it permanently damaged the president’s reputation.

5

The Teapot Dome scandal (1920s)

Until Watergate occurred, Teapot Dome was synonymous with political corruption. During the administration of Warren G. Harding, Secretary of the Interior Albert Fall took control of valuable federal oil reserves located at Teapot Dome, Wyoming, and Elk Hills, California.

Instead of opening these fields up for competitive bidding among energy companies, Fall secretly leased the drilling rights to private oil tycoons in exchange for more than $400,000 in bribes.

6

The Chappaquiddick incident (1969)

By the mid-20th century, the nature of political scandals shifted. Secrets began to involve personal crisis and tragic losses.

In July 1969, Senator Edward "Ted" Kennedy drove his car off a narrow wooden bridge on Chappaquiddick Island, Massachusetts. The vehicle overturned into a tidal pond, trapping and drowning his passenger, 28-year-old campaign worker Mary Jo Kopechne. Kennedy managed to escape but failed to report the fatal accident to the police for ten hours. Although he eventually pleaded guilty to leaving the scene of an accident, his delayed reaction ended his lifelong presidential ambitions.

7

The Pentagon Papers (1971)

In 1971, military analyst Daniel Ellsberg felt the moral obligation to leak a top-secret 7,000-page Department of Defense study detailing U.S. political and military involvement in Vietnam from 1945 to 1967.

Published by The New York Times , the papers exposed a disturbing truth: successive administrations had systematically lied to both Congress and the American public. The documents proved that the government had expanded the war and increased troop counts while knowing that the conflict was unwinnable. The Supreme Court eventually rejected the government’s attempts to block the leaks, making a victory for freedom of the press.

8

The Watergate scandal (1972–1974)

This is, probably, the ultimate American political scandal. In June 1972, five men were arrested breaking into the Democratic National Committee headquarters at the Watergate complex in Washington, D.C.

The break in itself was minor compared to the illegal cover-up orchestrated by President Richard Nixon and his collaborators. From paying hush money to instructing the CIA to block the FBI’s investigation, Nixon’s complicity was exposed via his own secret White House taping system. Facing impeachment and conviction by the Senate, Nixon became the first and only U.S. president to resign from office.

9

The "Keating Five" (Late 1980s)

During the Savings and Loan crisis of the late 1980s, five U.S. Senators—John McCain, Alan Cranston, Dennis DeConcini, John Glenn, and Donald Riegle—came under intense scrutiny.

The group was accused of intervening with federal banking regulators on behalf of Charles Keating, the chairman of Lincoln Savings and Loan, who had contributed to their political campaigns. Lincoln eventually collapsed, costing American taxpayers over $3 billion. Although the Senate Ethics Committee ultimately cleared the senators of corruption, they were publicly condemned.

10

The Bill Clinton–Monica Lewinsky affair (1998)

The 20th century ended with a scandal that blended personal infidelity with a constitutional crisis. In 1998, news broke that President Bill Clinton had an intimate relationship with a 21-year-old White House intern called Monica Lewinsky.

The affair turned into a legal battle when Clinton denied the relationship under oath during an unrelated sexual harassment lawsuit. The investigation led to Clinton’s impeachment by the House of Representatives on charges of perjury and obstruction of justice. The Senate ultimately acquitted him, yet he couldn’t bypass the media circus.