1

The Great Chicago Fire (1871)

Image: Ricardo Gomez Angel

The Great Chicago Fire burned for almost two days in October 1871, destroying thousands of buildings and leaving the city in ruins . Sparks, dry conditions, and wooden construction helped the flames race through entire neighbourhoods.

It was a painful turning point, but it launched a huge rebuilding effort. Chicago adopted tougher building codes, better water systems, and more specialized fire departments, becoming a model city for urban planning.

2

The Johnstown Flood (1889)

Image: Lukas Hron

In 1889, the failure of the South Fork Dam sent a massive wall of water toward the town of Johnston, Pennsylvania . The flood wiped out entire homes, bridges, and rail lines in a matter of minutes.

The Johnstown Flood drew attention to private dam ownership and safety inspections of such constructions. Engineers and lawmakers used its lessons to plan for better maintenance and more accountability for these large-scale structures.

3

The San Francisco Earthquake (1906)

Image: Library of Congress

The 1906 San Francisco earthquake struck before dawn, violently shaking the city and the surrounding areas . Broken gas lines and toppled chimneys sparked fires that raged for days , destroying block after block of homes and businesses alike.

Rebuilding was hard but transformative, as the city adopted stricter building codes, stronger materials, and better street layouts.

4

Triangle Shirtwaist Factory Fire (1911)

Image: Pukima ‎

The Triangle Shirtwaist Factory Fire of 1911 began on the upper floors of a New York City garment factory packed with workers. Locked exit doors, narrow stairways, and crowded conditions turned what would have been a relatively small blaze into a historic tragedy.

Public outrage was immediate and intense. The fire led to tough new safety laws, regular inspections, and rules for unlocked exits and fire escapes.

5

The Hindenburg Disaster (1937)

Image: Library of Congress

In 1937, the German airship Hindenburg approached its mooring mast in Lakehurst, New Jersey, after a transatlantic flight. Suddenly, it burst into flames and fell to the ground in front of cameras and radio reporters who witnessed the tragedy.

The disaster shocked the world and quickly ended the age of passenger airships. Public trust shifted toward airplanes, and the whole airship industry faded into obscurity almost completely.

6

The Texas City Disaster (1947)

Image: Ash Edmonds

The Texas City Disaster of 1947 began when a ship carrying ammonium nitrate caught fire in the bustling Texas City harbor . As crowds watched from the waterfront, the cargo exploded in a blast so powerful it shattered windows miles away.

The incident prompted sweeping changes in how hazardous materials are stored, transported, and labeled. It led to improved emergency planning, better first-responder training, and regulations aimed at preventing industrial catastrophes.

7

The Silver Bridge Collapse (1967)

Image: Suzanne Anderson

On a 1967 December day, the Silver Bridge that connected Point Pleasant in West Virginia to Gallipolis, Ohio, collapsed into the river below . Dozens of vehicles were on the bridge and fell into the water.

The collapse spurred nationwide inspections of older bridges and stricter design standards. It introduced new rules for maintenance, record keeping, and modern safety ratings.

8

Buffalo Creek Flood (1972)

Image: Chris Gallagher

In 1972, after days of heavy rain, a coal-waste dam above Buffalo Creek, West Virginia, gave way . A torrent of water and slurry rushed down the narrow valley, wiping out homes, roads, and small communities in its path.

The Buffalo Creek Flood drew national attention to the dangers of poorly regulated waste dams, and it helped push stricter environmental laws across the country.

9

Three Mile Island (1979)

Image: Lee Lawson

The Three Mile Island accident of 1979 began with equipment failures followed by human mistakes inside a nuclear power plant . Cooling problems led to a partial meltdown of the reactor core, alarming nearby residents and the entire country.

Even though it was contained, the incident reshaped nuclear energy in America. Regulators tightened training, communication, and emergency procedures.

10

Hyatt Regency Walkway Collapse (1981)

Image: AJOY DAS

The Hyatt Regency walkway collapse in Kansas City happened during a popular social dance event in 1981. Two suspended walkways above the hotel lobby suddenly gave way, crashing onto the crowded area below .

Investigations exposed serious flaws in the design and in the approval process itself. The disaster led to stricter engineering reviews, clearer responsibilities, and tougher building codes.

11

Exxon Valdez oil spill (1989)

Image: Yuval Zukerman

The Exxon Valdez tanker struck Bligh Reef in Alaska’s Prince William Sound in 1989, tearing open its hull. Crude oil spilled into the cold waters , drifting onto beaches, shorelines, and wildlife habitats in the surrounding area.

The spill led to new rules for double-hulled tankers, improved navigation systems, and better emergency response plans. It also inspired major environmental legislation and long-term monitoring to reduce the impact of future shipping incidents.

12

Deepwater Horizon (2010)

Image: Jonathan Gong

In April 2010, the Deepwater Horizon drilling rig experienced a blowout during exploratory drilling . A series of failures led to an explosion and a major well leak far below the ocean’s surface, drawing worldwide attention.

The disaster sparked new offshore drilling rules, better blowout preventers, and stricter inspection routines. It also sparked debates about energy policies and environmental protection.

1

California - "Eureka"

Image: Chor Tsang

According to legend, after the Ancient Greek mathematician Archimedes discovered his groundbreaking principle, he happily proclaimed, " Eureka! " This expression, which means "I have found it," is almost as famous as Archimedes’ work, so it stands to reason that the State of California chose Eureka as its state motto.

The Golden State’s slogan references the California Gold Rush. It is believed that a miner who finally struck gold was as excited about his discovery as Good Old Archimedes was. While the California State Seal has included the word Eureka since its design in 1850, it was only adopted as the state’s official motto over a hundred years later, in 1963.

2

Kansas - "To the stars through difficulties"

Image: Taylor Hunt

In 1861, the State of Kansas adopted its official state seal which depicted a beautiful prairie at dawn, filled with hardworking Kansans under 34 stars and the Latin motto Ad Astra Per Aspera. Anyone who reads the English translation of this motto will immediately realize how perfectly it describes the industrious and resilient people of Kansas: Ad Astra Per Aspera means "To the stars through difficulties."

Our 34th state chose this phrase alongside its state seal in 1861, only a few months after the first Governor of Kansas delivered the inaugural "State of the State" address. Nowadays, this motto stands as a reminder of both the bravery and diligence of the state’s first settlers, as well as the hardships that Kansas had to go through in order to gain statehood.

3

Indiana - "Crossroads of America"

Image: Steven Van Elk

The phrase "Crossroads of America" has long been associated with the state of Indiana , particularly after a specific intersection in Terre Haute, where U.S. Highways 40 and 41 met. Over time, Indiana itself proudly embraced the title of "the Crossroads of America," eventually adopting it as the state motto in 1937.

Interestingly, while "Crossroads of America" is the state’s official motto, some Hoosier cities have adopted this phrase —or variants of it— as their respective city slogans. For instance, Indianapolis adopted the motto in 1988, to reference how the city serves as a junction of 4 different Interstate Highways.

4

West Virginia - "Mountaineers are always free"

Image: Sara Cottle

Have you ever reached the summit of a particularly steep mountain after hours of arduous trekking? If you had to describe that amazing feeling in one word, what would it be? We’ll leave you to ponder that while we tell you the first word that came into our minds: freedom.

Apparently, we share this feeling with the good people of West Virginia , since its motto reflects the freedom that its magnificent mountains and hills inspire. West Virginia’s motto is the Latin phrase Montani Semper Liberi, which means "mountaineers are always free." Furthermore, since one of West Virginia’s demonyms is "mountaineers," this phrase also speaks to the core of West Virginians’ identity.

5

New York - "Excelsior"

Image: ben o'bro

Any Marvel fan will associate this phrase with comic-book legend Stan Lee, after all, he made this word his catchphrase throughout his many media appearances. However, you might be surprised to learn that "Excelsior" is also New York’s official state motto, and it perfectly describes New Yorkers’ industrious and resilient nature.

"Excelsior" is a Latin word that’s commonly translated as "Ever Upward," but it can also mean "higher" or "superior." It is featured in New York’s coat of arms, which features the representations of Liberty and Justice standing above the state’s motto.

6

Montana - "Gold and Silver"

Image: Trevor Vannoy

Just like West Virginia, Montana pays tribute to its breathtaking mountains and landscapes with its motto. However, it focuses on another key aspect of its geography, more akin to its nickname: Montana’s motto Oro y Plata literally translates to "Gold and Silver," which is a direct reference to The Treasure State’s proud mining history.

Montana first included the phrase Oro y Plata on its State Seal many years before it was adopted as the state’s official motto. Shortly after Montana was declared an official U.S. territory in 1864, the newly formed state honored the gold rush that had led to its territorial status by including its two most precious metals into its State Seal. Finally, the state motto was officialized in 1865.

7

Tennessee - "Agriculture and Commerce"

Image: Nathan Anderson

It’s no secret that state mottos sometimes reference their state’s most prominent industry: As we mentioned before, Montana and California pay tribute to the mining that helped build their economies. In that regard, Tennessee is no exception; its state motto is incredibly straightforward, directly praising the industries that helped the Big Bend State grow.

Tennessee chose "Agriculture and Commerce" in 1987. In turn, this motto was directly taken from the State Seal, which was adopted in 1801. The seal shows both sides of this state’s industry, with "Agriculture" referenced by a bundle of wheat and a cotton plant, while "Commerce" is depicted by a riverboat, presumably trading goods.

8

Texas - "Friendship"

Image: Brandon Zanders

Texas’s state motto may only feature one word, but it singlehandedly describes an essential part of Texan history. Before we can delve into that, though, we have to take a quick look into the etymology of the name of this great state. The word Texas is believed to come from the Caddo word táy:shaʼ , which means "friend." Spanish settlers adopted this word for the area, spelling it as Texas or Tejas.

In that sense, Texas pays homage to its history with the single-word motto "Friendship." Not only that, while Texas is mostly known by the nickname "The Lone Star State," its official slogan is "The Friendly State."

9

Vermont - "May the fourteenth star shine bright" & "Freedom and Unity"

Image: Eric Chen

Vermont is the only state on this list to feature two official mottos: "Freedom and Unity" and the Latin phrase " Stella quarta decima fulgeat, " which translates to "May the 14th Star Shine Bright." Interestingly, this last phrase is also the newest slogan to be made official, since it was elected as Vermont’s state motto in 2015.

In any case, both mottos represent Vermont’s individuality, strength, and, perhaps more importantly, its solidarity: "Freedom and Unity" describes Vermont’s mission to create a free and neighborly community, while "May the 14th Star Shine Bright" depicts the search of the common good throughout the entire state.

10

Rhode Island - "Hope"

Image: Praswin Prakashan

We’ll end this article with probably the most beautifully simple American state motto. The State of Rhode Island has the single-word motto "Hope," which is also featured in its State seal. In tune with their long maritime history, the seal depicts a golden anchor emblazoned in a dark blue field.

The inspiration behind both Rhode Island’s state motto and seal is probably a biblical quote found in the New Testament, which reads "Hope we have as an anchor of the soul." Considering that this state was founded by a Christian minister seeking to escape religious persecution, this single word expresses a very powerful sentiment: the hope that people could find in this new land a place of refuge and freedom.

1

Seattle Underground City

Did you know the remnants of Seattle's original streets are still accessible? Beneath the bustling streets of modern-day Seattle lies the Underground City , a network of subterranean passageways that formed the ground level in the 1800s.

By the end of the 19th century, after the Great Seattle Fire, it was decided to rebuild the city at a higher elevation to combat frequent flooding . So, these original streets, sidewalks, and storefronts were buried, and with it, much of their history.

Guided tours take people through tunnels and ladders and retell real and eerie stories about the history of the Underground City.

2

Luray Caverns

Image: Robert Thiemann

Have you ever heard of the underground Stalacpipe Organ ? Not only is it a one-of-a-kind interaction between keyboards and cavern stalactites, but it is also the largest musical instrument in the world, according to Guinness World Records.

This instrument lives in the Luray Caverns, Virginia. It consists of an electric console that taps on these ancient stalactites of varying sizes to produce musical tones. A subterranean wonder, these caverns are also known for their extraordinary size , housing towering stalactites and stalagmites, mirrored pools, and delicate drapery-like calcite formations.

3

The Underground Gardens of Baldassare Forestiere

Image: Adrian Botica

This stunning subterranean retreat was built entirely by hand. Tucked under the sun-scorched landscape of Fresno, California, lie the Underground Gardens of Baldassare Forestiere . They are the life’s work of Baldassare Forestiere, a Sicilian immigrant who started digging in the early 1900s to escape the Central Valley's oppressive heat.

Over 40 years, drawing inspiration from ancient Roman catacombs , Forestiere carved an elaborate network of underground rooms, passageways, grottoes, and courtyards that span 10 acres.

A unique masterpiece, the gardens are open with guided tours that lead guests through beautifully designed spaces featuring skylights, arches, and alcoves. This oasis also boasts an array of fruit trees, including citrus, figs, and olives.

4

Ruby Falls

Image: Goodfreephotos_com

Colorful and breathtaking, the Ruby Falls is a geological wonder located inside Lookout Mountain near Chattanooga, Tennessee.

Hidden over 1,000 feet below the mountain's surface, this waterfall cascades 145 feet into a pool , making it one of the tallest underground waterfalls open to the public.

Visitors enter the mountain and descend via elevator. Then, they walk through stunning cave formations such as stalactites, stalagmites, and flowstone. At the waterfall chamber, multicolored lights –powered by renewable energy– illuminate the falls. Lantern-lit tours are also offered as a chance to visit the marvel with a different charm.

5

The Catacombs of Green-Wood Cemetery

Image: Joy Ernst

Arched tunnels of tranquil, sacred vaults lie beneath the Green-Wood Cemetery in Brooklyn, New York. Built in the mid-19th century, these catacombs were designed as a prestigious resting place for the city’s elite , prominent families.

While the catacombs are typically closed to the public, special events are sometimes organized to welcome visitors, such as art expositions, guided history tours, and candlelit tours seasoned with live music and storytelling.

Outside, where the sun does reach, await the serene landscapes and remarkable monuments of the cemetery, which is itself a National Historic Landmark .

6

The Lost Sea

Image: Roberto Nickson

The largest underground lake in America is in Tennessee. Hidden within the Craighead Caverns in Sweetwater, this enormous body of water lies in a cave system filled with fascinating formations, such as stalactites, stalagmites, and rare anthodites, also known as "cave flowers."

A National Natural Landmark, this lake marvels scientists, who are yet unaware of the exact extension of its waters. Those who visit can embark on a boat ride called "The Lost Sea Adventure," first walking inside the cavern before reaching a boat to navigate these ethereal sights.

7

Mammoth Cave National Park

Image: Sherin Jacob

The Mammoth Cave National Park is home to the longest cave system in the world . Located in central Kentucky, it extends over 420 miles of explored passages and many more likely undiscovered. Enormous chambers, underground rivers, a labyrinth of tunnels, and gypsum crystal formations can all be found at this site.

The park has been declared a UNESCO World Heritage Site and an International Biosphere Reserve. It also includes over 52,000 acres of protected land on the surface, renowned for its lush forests and diverse wildlife.

8

Carlsbad Caverns National Park

Image: Cason Asher

A large bat colony lives in the Carlsbad Caverns National Park in New Mexico, but that’s not its only charm. The park boasts over 100 caves, with its centerpiece being the immense Carlsbad Cavern.

The cavern includes the Big Room, one of the largest underground chambers in North America, spanning 8.2 acres. Visitors can descend via an emblematic natural entrance or by elevator, dropping 750 feet underground. Stalactite formations like the Giant Dome, the Hall of the White Giant, and the Chandelier are some of the caves' breathtaking highlights.

9

Indian Echo Caverns

Image: Magda Ehlers

The Indian Echo Caverns, which have been open to the public since the early 1920s, are carved into the limestone of the Appalachian Mountains. Located near Hummelstown, Pennsylvania, this site gets its name from the echoes heard within the cavern’s chambers , which were once believed to be mystical by Native American people in the area.

Unique, immersive sections of the caverns have names like the "Crystal Palace," the "Echo Room," and the "Wedding Room," where, yes, real weddings are sometimes held!

10

Wind Cave National Park

Image: Francesco Ungaro

Wind Cave National Park, located in the Black Hills of South Dakota, is one of the world’s largest caves, but that’s not what it’s most famous for. One signature sight here is the boxwork formation , a rare lattice-like pattern formed by calcite deposits.

The cave system stretches for over 140 miles, though much of it remains unexplored. Popular tours take guests through captivating features like the "Ribbon Room" and the "Crystal Palace."

Why is Wind Cave called that? Mainly due to the "wind" phenomenon that occurs at its entrance. The cave's air pressure causes the entrance to draw in or expel air, depending on atmospheric conditions.