The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The eccentric mansion of one the most popular horror authors of modern times.

A Prada store in the West Texas desert that is never open for business.

The spaceship-like theater, which is still in use, was one of the most popular exhibits at the 1964 New York World's Fair.

The birthplace of a titan of American cinema.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Sail in for a ’dam good slice.

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

An Italian restaurant became a rock-and-roll hangout and the lair of the "Hollywood vampires."

This precariously perched fortress was once ruled by a crow-worshipping baron.

Once a 19th-century brasserie, this McDonald's exterior celebrates Alsatian design and the "King of Beer."

A bizarre house filled with an astounding array of collections.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

The most beautiful Taco Bell in the world even has surfboard parking.

Nearly four centuries after its founding, remnants of one of the oldest planned communities in North America are still visible in southern Brooklyn.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

Recognized the world over as the home of the McCallisters in the 1990 movie "Home Alone."

An abandoned underground bathroom is now a space for public art.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

An unassuming store hides relics of its former life as the jazz club that hosted some of the best black performers of the 1920s and '30s.

The eerie remnants of an ancient forest were hidden under the sand for centuries.