Subterranean Sites

The only ski tunnel in North America provides easy access to amazing snow and beautiful views.

Home to the longest wooden escalators in the world.

A World War II evacuation tunnel turned into a history display of Croatian state and people.

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

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

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

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

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

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

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

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

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

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

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

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