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Subterranean Sites

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Daniel Monnier in 2019, reflected in his polished limestone mirror.
tunnels

The Hidden French Tunnel Sculpture That Took 30 Years to Complete

Artist Daniel Monnier spent a couple of decades away before returning to complete his vision.
Sam Harrison September 25, 2019
Acequia Madre.
Santiago de Querétaro, Mexico

Acequia Madre

The remains of a centuries-old water system that inspired local legends of secret tunnels.
Cave of Zeus.
Kuşadası, Turkey

Cave of Zeus

This Turkish cave boasts some rather bizarre associations with the King of Mount Olympus.
Abandoned Eriksdal Train Tunnel.
Södermalm, Sweden

Abandoned Eriksdal Train Tunnel

It was meant to help transport wounded soldiers to a secret underground hospital.
Le Roy Lire.
Provins, France

Le Roy Lire

An atmospheric, medieval-themed book store hides in a 13th-century underground space.
The Little Tunnel.
Westmoreland, Tennessee

The Little Tunnel

This tiny 19th-century tunnel was built so a man could move his cows from one field to another.
London logo with Mexico City train.
Mexico City, Mexico

Metro Auditorio

This Mexico City subway station will make you feel like you've been transported to the London Underground.
Looking into the tunnel from the gift shop.
Traverse City, Michigan

Botanical Garden Visitor's Center Gift Shop Tunnel

It leads to a former hospital’s old root cellar.
Entrance to the tunnel.
Duluth, Minnesota

Ely's Peak and DWP Railroad Tunnel

A spooky defunct railroad tunnel now part of a sprawling trail.
Garden Santa Fe.
Mexico City, Mexico

Garden Santa Fe

The underground mall's skylights look like they could be part of a spaceship.
Chamber with Screaming Monster formation in Sudwala Caves.
Dollaaskraal, South Africa

Sudwala Caves

These otherworldly caverns form Earth's oldest known cave system.
Newhaven Fort
Newhaven, England

Newhaven Fort

A Victorian Fort built into the chalky cliffs that overlook the English Channel.
Thurgoland Tunnel.
Thurgoland, England

Thurgoland Tunnel

A repurposed railway tunnel with otherworldly acoustic characteristics.
Sierra Silver Mine.
Wallace, Idaho

Sierra Silver Mine

It was once used as a classroom to teach mining skills to local high school students.
The crypt.
Ripon, England

Ripon Cathedral Crypt

Reputedly based on the tomb of Jesus Christ, this crypt is the oldest surviving structure of any cathedral in England.
Gea de Albarracín, Spain

Albarracín-Cella Roman Aqueduct

This ancient tunnel is one of the most important examples of Roman hydraulic engineering in Spain.
Restored tunnel entrance.
Wallace, Idaho

Pulaski Tunnel Trail

This trail leads to a mine that was used as a sanctuary during the Great Fire of 1910.
The tunnels are not wide enough for two cars to pass each other.
Faroe Islands

Faroe Islands One-Lane Tunnels

The narrow passages will challenge even the bravest driver.