The fairy tale castle of the "fairy-tale king."

The world's oldest known salt mine.

Remnants of the Nazis' occupation of Denmark linger along the sand.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.

These prehistoric replicas were based on actual skeletal remains.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

Canada's subterranean Cold War museum has doubled as a movie set.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

With well over 130 falls and cascades to brag about, Hamilton, Ontario has earned its stripes as the waterfall capital of the world.

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

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

The design of this beautifully crafted building was inspired by Norwegian glaciers.

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

For six months of the year, three giant mirrors direct a pool of sunshine onto this otherwise occluded town.

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

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

There are no crying babies in this neck of the woods.

The world's most charming instant portrait studio also happens to be its smallest.

The rusted hull of a WWII German destroyer pokes above the surface in a Norwegian fjord.

The world's largest underground iron ore mine.

The world's first ice hotel is still one of the most elaborate and beautiful.

Walk through a restaurant's refrigerator door to reach this hidden bar.

See the rare bloom of the "Queen of the Night" cactus at one of the world's largest succulent collections.

Gargantuan home of Russian science.