World's first "penitentiary," meant to be humane, drove men insane.

A magical place that lets you play in and explore the world of Studio Ghibli.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

An emerald-green grotto just a short trip from Austin.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A terrific purveyor of natural history objects and curios.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A huge musical instrument played by the ocean.

On Japan's Tashirojima Island, cats are king.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

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

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

During prohibition, corrupt city officials ran drinking dens under the streets of Downtown Los Angeles.

An old Danish political institution where members of government can grab a drink off the record.

A collection of noses tucked inside an art museum reveals how times have changed.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

This former insane asylum now holds a pathological anatomy museum.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

The final resting place for the remains of 143 Habsburg royalty.