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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.

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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.

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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.

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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.

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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 .

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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.

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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.

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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.

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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!

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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.

1

The Museum of Bad Art (Massachusetts)

Founded in 1994, MOBA showcases art "too bad to be ignored," featuring paintings so spectacularly awful they circle back to being captivating . We're talking off-kilter portraits, baffling subject matter, and techniques that defy explanation.

The collection includes masterpieces like "Lucy in the Field with Flowers," featuring a grandmother dancing in a meadow while wearing what might be a nightgown. Each piece comes with a tongue-in-cheek description that treats these disasters with the same reverence the Met gives to Rembrandts.

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The International Banana Museum (California)

This museum holds the Guinness World Record for the largest collection of banana-related items . With over 25,000 banana things crammed into one yellow-painted space, it's exactly as bonkers as it sounds. Banana phones, banana lamps, banana art—if you can slap a banana on it, it's here.

The museum's motto is "Yes, we have no bananas... we have more!" which pretty much sums up the gloriously ridiculous vibe.

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The Museum of Broken Relationships (California)

This surprisingly poignant museum displays donated objects from failed romances , each accompanied by a brief story from the heartbroken donor. Started in Croatia and once home to an outpost in Los Angeles (before it closed in 2017), it transforms personal pain into a shared human experience. You'll find everything from wedding dresses to an actual prosthetic leg, each item representing a relationship that didn't quite make it.

What could be depressing is actually oddly uplifting: there's humor, anger, relief, and occasionally shocking pettiness on display. One exhibit features an axe someone used to destroy their ex's furniture.

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The International Cryptozoology Museum (Maine)

This Portland museum is dedicated to creatures that may or may not exist , from Sasquatch and the Loch Ness Monster to the Chupacabra. Founded by cryptozoologist Loren Coleman, it houses hair samples, plaster casts of mysterious footprints, and endless speculation about what's lurking in our forests and lakes.

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The Mustard Museum (Wisconsin)

Wisconsin's National Mustard Museum celebrates that yellow squeeze-bottle staple with 6,000+ varieties of mustard from all 50 states and over 70 countries . Curator Barry Levenson started collecting after his beloved Boston Red Sox lost the World Series in 1986, and a voice in a grocery store told him to pursue mustard instead. As one does.

The museum offers free tastings because, apparently, there's a whole world of mustard beyond French's that many of us have been missing. From champagne mustard to chocolate mustard to varieties with names you can't pronounce, it's a full-on condiment education.

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The Museum of Clean (Idaho)

Spanning 75,000 square feet, it chronicles the history of cleaning from ancient times to modern day . It features vintage vacuum cleaners, washing machines, and cleaning products that would horrify today's safety inspectors.

The museum makes a compelling case that cleaning technology has shaped civilization more than we realize. You'll see how our ancestors scrubbed, swept, and sanitized before electricity, and gain a weird appreciation for your Swiffer.

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The Mutter Museum (Pennsylvania)

This Philadelphia institution houses medical oddities, anatomical specimens, and antique medical equipment that can look more like torture devices. Think preserved organs, skeletal anomalies, and a wall of skulls that's both educational and nightmare-inducing.

The museum's most famous resident is the "Soap Lady," whose body turned into a soap-like substance after burial. There is also a sample of Albert Einstein’s brain tissue on display, because why not?

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The American Toby Jug Museum (Illinois)

Toby jugs are those quirky ceramic pitchers shaped like people's heads and bodies, usually depicting jolly characters in tricorn hats. This Evanston museum houses over 8,000 of them, representing the world's largest collection of these peculiar drinking vessels .

The collection spans centuries and includes rare jugs worth thousands of dollars alongside kitschy modern versions. You'll learn that Toby jugs have depicted everyone from Winston Churchill and Sherlock Holmes to characters from literature and politics.

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The Spam Museum (Minnesota)

This 14,000-square-foot museum in Austin, Minnesota, celebrates the canned pork product that fed armies and annoyed email users everywhere . Interactive exhibits let you pretend to work on the Spam production line, and you'll learn more about processed meat than you thought possible.

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The International UFO Museum and Research Center (New Mexico)

Located in Roswell, the site of the most famous alleged UFO crash in history, this museum is ground zero for alien conspiracy theories. Founded by people who claim firsthand knowledge of the 1947 incident, it presents eyewitness accounts, declassified government documents, and enough speculation to keep you wondering all night .

Beyond Roswell, the museum explores UFO sightings worldwide, alien abduction stories, and government cover-up theories that range from plausible to completely bonkers.

1

"The Star-Spangled Banner"

Arguably the most quintessential American song of all , its lyrics originated as a poem during the War of 1812, inspired by the experiences of Francis Scott Key during the British bombardment of Fort McHenry.

Surviving several controversies —from the violent content of its full lyrics to whether it is (or isn’t) easy to sing— "The Star-Spangled Banner", officially adopted as the U.S.’s national anthem in 1931, is now a symbol of unity and pride for many Americans.

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"America the Beautiful"

Once a strong contender for the official U.S. national anthem, this song celebrates the beauty of America, from the ideals upon which it was founded to the natural wonders within its borders .

Written by Katharine Lee Bates in 1893 and inspired by the landscape of Pikes Peak in Colorado, the song reflects the American dream of a more just and unified nation.

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"This Land Is Your Land"

A 1940 folk song by Woody Guthrie, this song was written as a response to idealized patriotism that overlooked the everyday struggles of the common American citizen .

A product of a society that was still overcoming the Great Depression, the song emphasizes the idea of the country as belonging to all its people.

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Yankee Doodle

Originally written by British soldiers in 1755 to mock colonial soldiers during the French and Indian War, and popularized during the Revolutionary War the song was later reclaimed by American soldiers after the Battle of Yorktown and turned into a symbol of independence.

What was initially meant as a mockery of " Yankee" (a New Englander) " doodle" (a fool or simpleton) became a source of pride and one of the most iconic American nursery rhymes.

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"Georgia on My Mind"

Composed in the 1930s by Hoagy Carmichael with lyrics by Stuart Gorrell, but famously covered by Ray Charles in 1960, this heartfelt ballad became an anthem for Southern nostalgia and love for the land .

A powerful ode to homesickness, it was adopted as the official state song of Georgia in 1979.

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"I Walk the Line"

Released in 1956 by country legend Johnny Cash, this iconic hit works as a pledge of devotion and faithfulness in the face of temptation.

Despite being written by Cash for his first wife Vivian, the song has since been widely interpreted as a promise of staying true to oneself.

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"Take Me Home, Country Roads"

One of the most well-known country songs of all time, the lyrics of "Take Me Home, Country Roads" were in part inspired by Maryland’s scenery as songwriter John Denver returned home for a family reunion.

Adopted as one of the official state anthems of West Virginia (due to a mention of the state in the lyrics), the song captures the fond feelings and sense of nostalgia associated with one’s hometown .

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"Fortunate Son"

The anti-war anthem of the late 1960s, Creedence Clearwater Revival’s "Fortunate Son" , first recorded in 1969, critiques a flawed system that favors the privileged few .

Addressing inequalities in the U.S. military draft system, which often excused those well-connected or placed them in safe positions while others were sent to the front lines, the song’s message has remained relevant for decades.

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"Sweet Home Alabama"

Written in part as a response to Neil Young's "Southern Man" and "Alabama," which were interpreted by some as blaming the entirety of the South for slavery and segregation, the 1974 Lynyrd Skynyrd song "Sweet Home Alabama" became an anthem of Southern pride in the face of prejudice and generalizations.

Sadly, the song has sometimes been misinterpreted as favorable towards segregationist policies, though members of the band have expressed their opposition to these ideas.

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"Born in the U.S.A."

Famously considered an anthem of national pride, many fail to recognize Bruce Springsteen’s "Born in the U.S.A." (1984) as a song of protest, written during the aftermath of the Vietnam War .

Describing the alienation suffered by returning veterans, its lyrics reflect the disillusionment of those who had defended American ideals, only to feel abandoned upon their return.