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

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

A unique bridge with an equally unique view.

A ruined castle stands atop a hill surrounded by dragon lore.

The castle where Martin Luther secretly translated the New Testament from Greek to German while in hiding.

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

Ancient cliffs resembling a kilt on Scotland's second largest island emit an entrancing sound.

These fantastically named natural pools look like something out of a Scottish myth.

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

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Stockholm's narrowest alley is barely over two feet wide.

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

Sweden's "good old days" painstakingly re-created in a model village.

Crooked windswept pines give this old forest an enchanted and magical look.

Swedish skyscraper with a 90° twist.

This chimerical bridge/tunnel appears to dead end right into the sea.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

Hamburgers are intensely proud of their tunnel beneath the river.