Invisible bridge parts the waters, invoking biblical images and preserving the ominous feel of an ancient moat.

Climb inside an iron crystal magnified 165 billion times its normal size.

Peek through a transparent pyramid and drink in the mountain made of books.

A museum dedicated to the Spanish occult in a town that was terrorized by the Inquisition.

Colorful and chaotic stacked hotel in North Holland.

This disused VLF radio station is no longer in service but the surrounding town still bears its name.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

This chest hospital with a dark, haunted past serves as a fitting set for horror films and a paradise for ghost hunters.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

18th century anatomical amphitheater of the Royal College of Surgery of Barcelona.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

Turntable anonymously received orphans, alms, and groceries.

Cursed swimming pool left abandoned is now a favorite of filmmakers and ghost hunters.

The only remaining collection of flayed figures made by French "madman" Honoré Fragonard.

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

Minimalist modern art on a repurposed military base in rural Texas.

A spring-fed pool so deep it's used for scuba diving as well as swimming.

The world's brightest bioluminescent bay.

Continuing the tradition of the dime museum in style.

Scale replica of China's ancient terracotta tomb warriors and Forbidden City are the side project of an eccentric millionaire.

A popular swimming hole that hides one of America's most deadly diving spots.

Most famous work of one of Frank Lloyd Wright's sons.

Resting place of Hollywood's immortals is also site of summer film screenings.

San Diego's most historic and haunted home.