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Manhattan Well
murder

The Manhattan Well: How Aaron Burr and Alexander Hamilton United to Solve a Murder Mystery

In 1800, Elma Sands was found murdered at the bottom of the Manhattan Well. What followed was America’s first recorded trial.
The Podcast Team June 27, 2025
Beneath downtown Minneapolis, Schieks Cave has surprisingly warm groundwater, evidence of a subterranean heat island.
subterranean

Schieks Cave Below Minneapolis Contains a Lake of Warm Sewage

An urban explorer ventured deep below the bustling streets of downtown Minneapolis. He discovered more than he bargained for.
The Podcast Team June 26, 2025
The Big Well
subterranean

This Kansas Town Advertised the World’s Largest Well. It Wasn’t.

From its hand-dug well to its fully sustainable power grid, Greensburg’s defining characteristic has been its own constant reinvention.
The Podcast Team June 12, 2025
Alexandria, Egypt

Sister Library of Alexandria

Underneath the Serapeum ruins lies a dark passage with nooks for books, the lesser-known “sister” to the famous ancient library.
Valletta, Malta

Lascaris War Rooms

Both the World War II Allied Forces and NATO have used this modern bunker underneath Malta’s capital.
Taşkuyu, Turkey

Taşkuyu Mağarası (Taskuyu Cave)

This 470-meter-long dripstone cave was discovered by chance in 2006.
Ashchimuryn, Kazakhstan

Shakpak-Ata

A remote, centuries-old underground mosque with a lunar aesthetic.
Saint Charles, Idaho

Minnetonka Cave

Idaho’s largest, deepest limestone cave is known for its quirky rock formations and bat population.
Xiangliab, Laos

Tham Nang Ene Cave

Mythological depictions of Laos’ national animal make this cave sacred.
Liena, Australia

King Solomon's Cave

A limestone cave filled with impressive formations in Mole Creek Karst National Park.
Tuzluca, Turkey

Tuzluca Salt Mines

A former salt mine is now a cool picnic spot for families and asthmatics.
Ewing, Virginia

Sand Cave

Erosion has transformed this sandstone boulder into a massive dune-filled cavern.
Aracena, Spain

Gruta de las Maravillas (Cave of Wonders)

An underground spring in a labyrinthine cave system, decorated with stalagmites and stalactites.
subterranean

Podcast: Buffalo Bayou Park Cistern

This 90-year-old underground reservoir once held 15 million gallons of drinking water for the people of Houston.
The Podcast Team January 24, 2024
Orderville, Utah

Belly of the Dragon

Nature has shaped this drainage tunnel into the digestive tract of a mighty beast.
abandoned

Podcast: Old City Hall Station

One of New York City's abandoned marvels is both easy and difficult to access.
The Podcast Team December 18, 2023
Skørping, Denmark

REGAN Vest

Deep in the forest of northern Denmark, this secret underground bunker was built at the height of the Cold War.
Vegacervera, Spain

Cueva de Valporquero

The spectacular geological formations make it one of the most impressive caves in Europe.