This secret facility trained seals for the Swedish navy during the Second World War.

The Swedish flag over this small naval fort signals that the nation is at peace.

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

A former suicide bridge is now accumulating symbols of love instead of a body count.

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

A 200-year-old collection of medical paraphernalia in a historic house.

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

A small collection of magic tricks and memorabilia is now an apartment-sized museum.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

Across the Pacific in a raft, a museum dedicated to Thor Heyerdahl's now legendary expedition.

An artist's mausoleum with a haunting echo.

Home to three historic ships from the age of Vikings.

An intricately carved Viking church overlooks a glistening fjord.

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

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

A Viking-style brewpub named for a Norse sea giant, in the heart of fjord country.

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