What Lies Beneath?

R. Courtland
By R. Courtland

SubTropolis: The Underground City You Never Knew Existed

Beneath the rolling plains of Kansas City, Missouri, lies an almost mythical underworld: SubTropolis. Stretching across 55 million square feet of limestone caves, this subterranean city has captured imaginations for decades. But what is really down there? Are there hidden secrets behind its walls, and what does the future hold for this cavernous wonder? Let’s delve into the mysterious world of SubTropolis, separating fact from fiction, and uncovering truths that are stranger than any conspiracy.

The Derinkuyu underground city is an ancient multi-level cave city in Cappadocia, Turkey.

The Origins of SubTropolis

SubTropolis began as a limestone quarry in the 1940s. As miners carved away at the Bethany Falls limestone deposit, they unknowingly laid the groundwork for what would become the largest underground business complex in the world. By the 1960s, local developer Lamar Hunt saw potential in the voids left behind. Why not repurpose these vast spaces for storage and business? With a consistent 65-degree temperature, low humidity, and natural insulation from storms and weather, the underground expanse was perfect for a wide range of uses.

Today, SubTropolis houses more than 7 million square feet of leasable space, serving over 55 tenants, including storage facilities, data centers, manufacturing companies, and even an underground post office.

Dump truck

Who (or What) Lives Down There?

Contrary to the wildest rumors, SubTropolis isn’t home to a secret society of subterranean dwellers—or is it? While the facility is strictly a commercial hub, whispers of people secretly living or hiding below the surface persist. Experts in urban planning note that SubTropolis has the infrastructure to support life, with its own ventilation systems, roadways, and access points.

An anonymous employee shared, “There are parts of SubTropolis we rarely enter—unlit, unfinished tunnels that stretch for miles. You hear stories of squatters or even animals living down there. Whether it’s true or not, no one wants to find out.”

While the conspiracy of underground residents remains unproven, some claim that the U.S. government uses sections of SubTropolis for classified storage or even as a secure facility for emergency purposes. The General Services Administration does, in fact, lease storage space there, fueling these theories.

Politicians Holding Hands Around Burning World

Getting Down There

Accessing SubTropolis isn’t like stepping into a sci-fi movie. A series of ramps and driveable roads connect the subterranean space to the surface. Commercial trucks and employees enter daily through well-lit, patrolled entrances. But it’s what lies beyond these regulated zones that intrigues many.


“Exploring SubTropolis without authorization is virtually impossible,” says Dr. James Halliday, an expert in urban underground development. “Cameras, security checkpoints, and controlled lighting ensure that no one ventures where they shouldn’t. But that doesn’t mean there aren’t areas that remain untouched since the quarrying days. Those zones hold the most mystery.”

3d render, abstract neon background, glowing blue rounded arch, stairs, steps, performance stage design, empty fashion podium, ultraviolet light

The Future of SubTropolis

The vision for SubTropolis doesn’t end with storage. Developers are eyeing the underground space as a potential site for innovative new uses. Concepts include underground farming, expanded data centers for tech companies, and even emergency climate shelters as extreme weather becomes more common.

But not all experts are convinced this is the right path. Dr. Elaine March, an urban geologist, warns, “Expanding underground infrastructure comes with risks, from structural stability to environmental impacts. While SubTropolis is a marvel of engineering, overuse could push it beyond safe limits.”

Still, with rising costs of land and increasing interest in sustainable urban solutions, SubTropolis is likely to remain at the forefront of underground development.

Mine work underground

Conspiracies and the Shadowy Unknown


SubTropolis’s size and secrecy have naturally attracted conspiracy theories. Among the most popular:

 1. A Government Bunker: Some believe SubTropolis connects to a network of underground bunkers used by the federal government. While there’s no evidence, the facility’s scale and proximity to U.S. government clients add fuel to the fire.

 2. Hidden Experiments: The isolated nature of SubTropolis makes it a prime candidate for speculative experiments—everything from biotech research to weapon testing.

 3. A New Underground Society: One of the wilder claims is that SubTropolis could house a breakaway civilization. This idea stems from its ability to remain self-contained, with controlled temperatures and natural insulation.

Although these theories are unsubstantiated, they highlight the allure of what remains unknown. As one anonymous tenant put it, “There’s enough space down here for things to happen that the rest of the world would never see.”

Secret bunker meeting

A Hidden World

SubTropolis isn’t just an underground warehouse; it’s a testament to human ingenuity and ambition. But it’s also a reminder of how little we know about the spaces beneath our feet. Whether it’s a futuristic urban hub or the source of countless conspiracies, SubTropolis continues to intrigue and inspire.

As we look to the future, perhaps the real question isn’t what’s down there, but how much more could be. After all, the final frontier might not be the stars above, but the ground below.

Beautiful aerial drone view of the San Felipe Castle, with the huge Cartagena Flag waving and the city in the the background