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Subterranean Sites

Springfield, Virginia

Orange and Alexandria Railroad Culvert

This little brick tunnel built by Confederate forces was used to conduct surprise attacks on the railroad.

Alexandria, Virginia

Wilkes Street Tunnel

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

Stazione Neapolis

A special area of the National Archaeological Museum of Naples is located inside a metro station.

Nynäshamn S, Sweden

The Landsort Artillery Battery

A southern Swedish island is home to the last ERSTA artillery battery, meant to protect the shoreline during the Cold War.

Edinburgh, Scotland

Colinton Tunnel

This former train tunnel is filled with lines from a poem crafted by Robert Louis Stevenson.

8 Blissfully Shady Spots to Escape the Arizona Sun

Milton, Wisconsin

Milton House Museum

The tunnel that runs beneath this former inn was once a hiding place for enslaved people seeking freedom.

Puente Viesgo, Spain

Caves of Monte Castillo

The walls of these four caverns are filled with art that dates back to the earliest human presence in Europe.

Akiyoshido Cave

Approximately 300 million years ago, a massive coral reef existed in what is now the largest limestone cave in Japan.

Hurricane, Utah

Zion–Mount Carmel Tunnel

A tunnel with windows, so you don't miss out on the impressive views.

Cricova, Moldova

Wine Cellars of Cricova

Seventy-five miles of limestone caves host more than a million bottles of wine beneath a sleepy Moldovan town.

Rožanstvo, Serbia

Stopića Cave

Through the colossal entrance to this cave you'll find limestone tubs and an underground waterfall.

Peach Springs, Arizona

Caverns Grotto

In a 345-million-year-old cave that's 200 feet underground, dinner awaits.

What a Viral Video of a Coyote and Badger Says About Interspecies Duos

Sometimes they're buddies. Sometimes it's strictly business.

Jennifer S. Holland February 10, 2020

Tulelake, California

Crystal Ice Cave

Each winter this underground cave forms a dazzling ice palace.

Boolboonda, Australia

Boolboonda Train Tunnel

The longest manmade tunnel in Queensland is now a beautiful trail, home to a special colony of bent-wing bats.

Mount Joy, Pennsylvania

Bube's Brewery & Catacombs

In the bowels of a 19th-century brewery lurks a fine-dining restaurant offering an array of themed feasts.

The Mermaid Inn

This centuries-old hotel hides a network of secret cellars and passages once used by smugglers.