The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

A fantastic castle rumored to be the birthplace of King Arthur.

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

Introducing the Green Fairy to her fawning masses.

Imagine playing a version of Legends of the Hidden Temple, but with a distinctly Southern Gothic flare.

The restaurant keeps a hidden séance room on the second floor and reserves a table for the spirit of the former owner each night.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

The curiosities and wonders of pharmacy in a delightful historic building.

The only rotating bar in New Orleans has been slowly spinning since 1949.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

The second oldest continuously operating bar in Louisiana.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

A 1920s home transformed into an immersive art experience, where every room is a portal to another realm.

A historic hotel that made a cameo in Hitchcock's classic film has no intention of letting guests forget its fame.

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

San Francisco's newly reopened hands-on science museum.

The only theatre in the world constructed specifically for sound movement.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A psychedelic labyrinth on the San Francisco bay.

The monument's pointy aluminum tip has been melted down by repeated lightning strikes.

There’s a hidden military meme engraved on the World War II Memorial.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.