Explore 304 Underground Collections - Atlas Obscura
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Ashchimuryn, Kazakhstan

Sultan Epe Underground Mosque

An underground unique sacred place in the Kazakh steppe in which Sufism and nomadic tradition merge.
Pirgos Dirou, Greece

Caves of Diros

This cave complex might provide a link between the Neolithic and the Classical Greek period.
List

Caves, Caverns, and Underground Attractions in Pennsylvania

Get the lowdown on what’s underground.
Slovenia

Kranj Ossuary

Thousands of medieval skeletons lie just beneath Kranj’s main square.
Saumur, France

The Mushroom Museum

A subterranean museum where mushrooms still grow in the tunnels of a centuries-old quarry.
Perugia, Italy

Rocca Paolina

Medieval streets buried beneath a papal fortress now form an underground city you can walk through.
Lohja, Finland

Tytyri Mine

Descend 100 meters underground to explore Finland’s mining history.
Villacañas, Spain

Museo Etnográfico del Silo

Go underground to find a collection representing the history of this village in the heart of La Mancha.
Tanygrisiau, Wales

Deep Sleep

For the deepest sleep of your life, head 1,375 feet underground in Wales.
Le Locle, Switzerland

Underground Mills

Water mills built into a cave in the 17th century are powered by a subterranean river.
Bergen, Norway

Hulen in Bergen

This student-run nightclub was originally a World War II bomb shelter.
One of the PATH’s many entrances.
art

A Supposedly Boring Mall I Might Actually Visit Again

In an underground maze filled with miles and miles of retail storefronts, our reporter searches for the heart of the Canadian dream.
The Podcast Team June 7, 2025
Entrance to the Mount Carmel Tunnel
List

12 Incredible Caves and Caverns Hidden in National Parks

Underground or inside, each spot on this list is more than meets the eye.
Roxanne Hoorn May 9, 2025
La Rochelle, France

Le Bunker De La Rochelle

Under the streets of La Rochelle, a former wartime bunker holds some surprising secrets.
London, England

Gloucester Road Underground Station Disused Platform

The extra platform at Gloucester Road has been used for art displays for over 25 years.
London, England

St James’s Tiny Park

These former ticket office windows in London's underground now house pocket-size parks.
Old Station, California

Subway Cave

A large lava tube that can be walked through with no special equipment.
Remnants of the streetcar station.
List

Treat Yourself to a Scavenger Hunt Through DC’s Most Delightful Destinations

13 places, 5 hints, and 70 secret doors.