In the summer of 2014, a sinkhole in downtown Cedar Rapids cracked open a forgotten chapter of American history. Beneath the city, engineers discovered vast brick-lined chambers—19th-century beer caves once used to store thousands of barrels before refrigeration changed brewing forever.

These underground vaults tell the story of immigrant brewers, the rise of Iowa’s beer industry, and how Prohibition sealed away a hidden world. In this episode, we uncover how these caves were built, why they vanished, and what remains today beneath the streets of Cedar Rapids.

What happens when the dead need to travel? In the 19th century, booming cities like London ran out of burial space—and the solution wasn’t underground. It was on the rails. In 1854, the London Necropolis Railway launched a one-way ticket to the afterlife, transporting coffins and mourners to a sprawling cemetery outside the city. But the real transformation began when Abraham Lincoln’s body was placed aboard a 1,600-mile funeral train that changed how the world said goodbye to its leaders.

In this episode, we trace the powerful history of funeral trains—from Lincoln’s national procession and Churchill’s code-named “Operation Hope Not” to FDR’s armored railcar and the plexiglass windowed carriage of George H.W. Bush. Along the way, we’ll explore the symbolism, technology, and tragic moments that defined this forgotten tradition. These were more than trains. They were moving monuments to grief, power, and memory.

The Huber Breaker wasn’t just another coal-processing plant—it was a steel giant capable of crushing 7,000 tons of anthracite coal every single day. Built in 1939 as the last great hope for Pennsylvania’s coal industry, it symbolized both the power of American industry and the human cost behind it. This machine didn’t just break coal; it broke the workers and communities who depended on it.

In this episode, we uncover the haunting story of the Huber Breaker—its rise as a technological marvel, its decades of harsh labor and exploitation, and its slow collapse into an abandoned hazard. From breaker boys to Blue Coal branding, and from immigrant labor to urban explorers, discover how this towering relic of the coal age shaped—and scarred—Pennsylvania.

In the 1920s, San Pedro’s Point Fermin was a coastal paradise—bungalows perched on ocean bluffs, palm-lined streets, and Red Car trolleys connecting it all. But by 1929, the ground beneath this dream neighborhood began to shift. Cracks split sidewalks, homes tilted toward the sea, and entire streets disappeared in slow motion.

Today, this collapsed community is known as Sunken City—a forbidden ruin fenced off from the public, yet still visited by thrill-seekers and graffiti artists. In this episode, we uncover how one of Los Angeles’s most promising neighborhoods crumbled into the Pacific, and what traces remain of the lives once lived there.

1923, workers hauled thousands of lightbulbs, steel beams, and lumber up a steep canyon to advertise a housing development called Hollywoodland. Meant to last just 18 months, the sign survived collapse, neglect, and decades of change — eventually transforming into one of America’s most recognizable landmarks.

But today, the Hollywood Sign is more than a cultural icon — it’s also a highly protected zone. In this episode, we explore how a real estate stunt became a pop symbol, why it was nearly torn down, and how modern-day visitors risk arrest just by getting too close.

In the 1860s, London built a futuristic underground network that few people remember today. Long before the Tube or Mail Rail, the Pneumatic Despatch Company operated a series of capsule trains—powered by compressed air—that shuttled letters and parcels beneath the city at breakneck speed. It was efficient, innovative, and ahead of its time.

Backed by major investors and the British Post Office, this Victorian system promised to solve the city’s growing logistical challenges. At its peak, it could send mail between stations in under a minute. But just over a decade later, it vanished—abandoned, sealed off, and largely forgotten. So what happened to the Pneumatic Despatch Company? And could parts of it still survive beneath modern London?

Hidden just steps from the Washington Monument lies a granite marker most people overlook—but this modest stone was once meant to become the center of the world. The Jefferson Pier Stone, placed in 1804, was part of a bold plan by Thomas Jefferson to sever the United States from European dominance by creating a new prime meridian through Washington, D.C.

But Jefferson’s dream quietly faded. The stone, lost and later rediscovered, now sits half-forgotten on the National Mall—an echo of America’s ambition to define its own place in the world. In this episode, we explore the forgotten history of the Jefferson Pier, the political defiance behind its placement, and how it was nearly erased from public memory.

At the edge of the Pacific Northwest lies one of the deadliest stretches of water in North America—the Columbia Bar, where the Columbia River meets the Pacific Ocean. This isn’t just a river mouth—it’s a maritime gauntlet where unpredictable sandbars, deadly tides, and violent storms have claimed over 2,000 vessels. For generations, sailors have called it the Graveyard of the Pacific.

In this episode, we uncover the harrowing history of this infamous region—from Indigenous knowledge systems to shipwrecks like the SS Valencia and SS Pacific, whose wreckage remained hidden for over a century. We’ll explore how bar pilots risk their lives to navigate these waters, and how the U.S. Coast Guard continues to protect one of the most dangerous coastlines in America.

Beneath the streets of New York City lies the skeleton of one of the most ambitious communication systems in U.S. history: a 27-mile pneumatic mail network that once moved 100,000 letters a day—using nothing but air pressure. From 1897 to 1953, steel canisters shot through underground tubes at 35 miles per hour, connecting 23 post offices across Manhattan and Brooklyn. It was fast, reliable, and nearly invisible to the public.

So why did this futuristic mail system vanish? And how did something so ahead of its time become obsolete in just a few decades? In this episode, we explore the rise and fall of New York’s pneumatic mail system—from ceremonial cat launches and same-day Wall Street contracts to deadly tube explosions and sandwich deliveries gone rogue. Plus: what’s still down there today.

At the foot of Market Street stands the San Francisco Ferry Building, a majestic landmark overlooking the Bay. But for decades, this architectural gem was hidden behind a double-decker freeway, its grand arches obscured, its interior gutted, and its legacy nearly erased from the city’s memory. At one point, there were serious plans to demolish it altogether.

This episode dives into the astonishing rise, fall, and resurrection of one of San Francisco’s most important structures. From its origins during the Gold Rush to surviving two major earthquakes—and nearly being destroyed by urban planning—the Ferry Building’s story is one of resilience and reinvention. Discover how a forgotten transportation hub became a symbol of civic pride once more.