In addition to fine dairy products, the world's most beautiful milk shop also offers a feast for the eyes.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

The medieval castle built as headquarters for the Pope's secretive Knights Templar.

The top of society once luxuriated in this world-class hotel, which continues to impress, even in ruin.

Walk through Czech history in Prague's largest graveyard.

This beautifully designed star-shaped fort was the premier defense system of the late 1500s.

A psychedelic labyrinth on the San Francisco bay.

A fairytale-like medieval church perched atop a rocky cliff on Italy's "Coast of the Gods."

A fairytale Gothic castle steeped in Nazi treasure conspiracy theories.

Double spiral staircases are not unheard of, but they are very rare.

This burial pyramid in central Ireland is thousands of miles and thousands of years away from its Egyptian inspiration.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

On the Oregon coast there is a natural hole that seems to be draining the sea.

The world's greatest slide descends 18 stories from this looping mountaintop viewing platform.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

Bell tower juts out from a village buried under a lake.

An Austrian house of bones filled with hundreds of intricately painted skulls.

The world's oldest known salt mine.

Fantastic stories on a miniature railroad.

Enter the cabin of a life-sized Hindenburg replica.

The amazing wonder cabinets of a very rich Austrian archbishop.

Mozart's skull may be held in this collection, but definitive proof continues to elude scientists.