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Subterranean Sites

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Vegacervera, Spain

Cueva de Valporquero

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

Taya Caves

A network of ancient tunnels and vaulted chambers with mystical Buddhist reliefs, built for ascetic training.
Viñales, Cuba

Cueva del Indio

Besides being home to cave paintings and pre-Columbian Cuban archaeological remains, you get to take a boat through this stalactite and stalagmite covered caved.
Padirac, France

Le Gouffre de Padirac (Padirac Cave)

This impressive chasm is one of the longest natural underground cavities in the world.
Tokyo, Japan

Asakusa Underground Street

Stuck in a bygone era, the oldest subterranean shopping street in Japan hides beneath the popular Asakusa district of Tokyo.
Houston, Texas

Downtown Houston Tunnel System

The largest underground pedestrian tunnel system in the U.S. mostly caters to the people working in the offices above, but provides a great, air-conditioned way to traverse the city.
libraries

Podcast: Spaces for Spies

Where real-world American espionage comes to life.
The Podcast Team July 25, 2023
Horse Cave, Kentucky

Hidden River Cave

Once one of the most polluted caves in America, now an environmental success story and a museum dedicated to caves.
Scientists explore the lava tube they have dubbed the "Red Cave" for its rusty hues.
subterranean

Taking the First Steps Into a Newly Formed Volcanic Underworld

More than a year after a devastating eruption in the Canary Islands, a team is exploring a braided network of still-hot lava tubes.
Maya Wei-Haas July 19, 2023
Pune, India

University Tunnel

This 300-foot-long underground tunnel was once used to transport food from the kitchen into the main building.
Utrecht, Netherlands

DOMunder Subterranean Ruins

Underground attraction offering tours of the foundational ruins of a church nave that collapsed in 1674.
North, Arkansas

Cosmic Cavern

The warmest cave in the Ozarks features two seemingly bottomless lakes.
bunkers

Podcast: The Greenbrier

This fallout shelter beneath a West Virginia resort was a state secret until 1992.
The Podcast Team June 13, 2023
On the platform.
Lovelock, Nevada

Lovelock Cave

How a bat poo mine became a major Native American archaeological site—and connections to legendary red-haired giants.
There's still much scholars don't know about Villa. Even the exact year of her death remains a mystery.
subterranean

The Female Architect Behind Buenos Aires's Underground Necropolis

Ítala Fulvia Villa oversaw the building of the colossal Sixth Pantheon—but history nearly erased her contributions.
Daniel Maurer March 8, 2023
Outside cave, showing other end of collapsed lava tube.
Shoshone, Idaho

Shoshone Ice Caves

This underground cave located in the most barren reaches of Idaho is filled with ice year-round.
Kaneana Cave
Waianae, Hawaii

Kaneana Cave

This coastal cavern is associated with the Hawaiian god of creation.
Underground House
Las Vegas, Nevada

Underground House

A luxurious doomsday bunker hidden beneath an unassuming Las Vegas home offers the best of subterranean suburbia.