The "dragon babies" of southeastern Europe.

This abandoned Slovenian military barracks has become a punky-political art squat.

This one-time health resort was used by aristocrats around the world.

This massive subterranean fissure is known as the "underground Grand Canyon."

A symbol for the opposition to nuclear power around the world.

An old Danish political institution where members of government can grab a drink off the record.

From buck blood to Theriak miracle tonic, this collection of Renaissance chemist's gear look's like a wizard's pantry.

Early habitat dioramas and home of the elusive gaff, the skvader.

The remains of Alfred Nobel's first nitroglycerine factory can still be found on the shores of a Swedish bay.

Stockholm's deepest subway station is also a stunning ecological wonder.

It houses the remains of a 17th-century version of the Titanic.

A thin pane of glass keeps visitors from sliding off this futuristic skywalk.

Walk 2,300 feet above the ground on the "Troll's Tongue."