Most of us spend our travels looking around us.
We admire skylines, mountain views, historic buildings, and quirky roadside attractions. Rarely do we stop to think about what’s directly beneath our feet.
That question first occurred to me earlier this summer in Cincinnati.
My husband and I signed up for the Hidden Caverns Tour with American Legacy Tours in the Over-the-Rhine neighborhood. I knew there were historic beer tunnels beneath the city, but I had no idea what the experience would actually be like. The descent felt more like climbing down a ladder than a staircase, and within seconds the hot August afternoon disappeared. The temperature dropped, the stone walls surrounded us, and suddenly we were standing inside Cincinnati’s brewing history.
As our guide explained how these underground tunnels helped transform Cincinnati into one of America’s great beer cities, I found myself wondering:
If Cincinnati has something this incredible hidden beneath its streets, what else is hiding underground across America?
As it turns out… quite a lot.
1. Cincinnati Lagering Tunnels – Cincinnati, Ohio
Long before refrigeration, German immigrants solved a simple problem: lager beer needs cold temperatures to ferment properly.
Beginning in the 1850s, Cincinnati breweries carved enormous limestone lagering tunnels beneath Over-the-Rhine where the naturally cool environment kept beer at the perfect temperature year-round. The city’s brewing industry flourished, making Cincinnati one of America’s beer capitals.
When Prohibition shut down the breweries, many of the tunnels were abandoned and eventually forgotten. Some weren’t rediscovered until decades later during building renovations, when construction crews unexpectedly broke through walls into massive underground chambers.
Today, American Legacy Tours takes visitors beneath the streets to explore this hidden world while sharing stories of brewing, immigration, and Prohibition. If you enjoy history, architecture, or craft beer, it’s one of the most fascinating tours I’ve experienced.
2. The Greenbrier Bunker – White Sulphur Springs, West Virginia
Hidden beneath the luxurious Greenbrier Resort sits one of America’s most remarkable Cold War secrets.
Beginning in the late 1950s, the U.S. government secretly constructed a massive underground bunker designed to house every member of Congress in the event of a nuclear attack. For more than thirty years, the facility remained hidden behind what appeared to be an ordinary hotel addition.
Inside were dormitories, communication centers, meeting chambers, a cafeteria, and enough supplies to allow Congress to continue operating if the unthinkable happened.
The secret finally became public in 1992, and today visitors can tour the bunker to learn about one of the country’s most fascinating pieces of Cold War history. Standing behind the enormous blast door is a powerful reminder that history isn’t always found in museums—sometimes it’s hidden beneath luxury resorts.
3. Strataca – Hutchinson, Kansas
Some discoveries happen completely by accident.
In 1887, a driller searching for oil near Hutchinson instead uncovered one of the world’s largest rock salt deposits, formed nearly 275 million years ago beneath an ancient inland sea.
Today, visitors descend 650 feet underground into Strataca, part active salt mine and part museum. The constant underground temperature makes the experience comfortable year-round, and visitors explore historic mining areas by tram while learning how salt has shaped the region’s economy for more than a century.
One of the most surprising facts? Salt mines like this provide such stable conditions that underground storage facilities nearby protect priceless film negatives, important documents, and other irreplaceable collections.
It’s a destination that’s part geology lesson, part industrial history, and completely unlike anything else you’ll experience.
4. Seattle Underground – Seattle, Washington
Seattle’s Underground exists because the city literally rebuilt itself.
After the Great Seattle Fire of 1889 destroyed much of downtown, city leaders decided not only to rebuild but to raise the streets to solve long-standing drainage and sewage problems. Instead of demolishing the original buildings, they simply built new streets above them.
For years, businesses operated in this strange in-between world where customers entered on what had become the second floor and climbed down to reach the original storefronts.
Eventually the old city was abandoned and largely forgotten until historian Bill Speidel helped rediscover it in the 1960s. His Underground Tour not only introduced visitors to Seattle’s hidden past but also helped preserve the historic Pioneer Square neighborhood.
Today it’s one of Seattle’s most popular attractions and a fascinating reminder that sometimes an entire city can disappear without ever leaving.
5. Forestiere Underground Gardens – Fresno, California
Of all the underground places I discovered while researching this episode, this one may be my favorite.
Baldassare Forestiere immigrated from Sicily hoping to grow citrus in California. Instead, he discovered the land he purchased was covered by an almost impenetrable layer of hardpan, making traditional farming nearly impossible.
Most people would have given up.
Forestiere picked up a shovel.
Over the next forty years, he hand-dug an extraordinary network of underground rooms, courtyards, tunnels, and gardens that naturally stayed cool during California’s intense summers. Skylights allowed sunlight to reach citrus trees, grapevines, and other plants, many of which continue producing fruit today.
The Forestiere Underground Gardens remain family-operated, and visitors can tour this remarkable underground world that began with one man’s determination to solve an impossible problem.
Looking Below the Surface
As I researched these five destinations, I realized they all share something unexpected.
None of them were built to become tourist attractions.
The beer tunnels solved a brewing problem.
The Greenbrier Bunker prepared for a national emergency.
Strataca grew from an accidental discovery.
Seattle’s Underground was created during the city’s rebuilding.
The Forestiere Underground Gardens turned impossible land into a thriving oasis.
Years later, we travel to experience the creativity, ingenuity, and perseverance that made each of them possible.
So the next time you’re planning a road trip, don’t just look at what’s on the surface.
Some of America’s most fascinating stories are waiting beneath your feet.
