Subterranean Sites in Norway

Local legends say that a giant who tried to destroy a nearby church lived in this rock cave.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

A naturally occurring tunnel in this Nordic mountain makes it look like it's been shot.

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.

The last fully functional fortress of Germany's World War II Atlantikwall.

Cold storage for agricultural biodiversity.