A shrine to a skeleton saint in the city of angels.

Gift shop offering toe tags and chalk body beach towels tucked into a coroner's office.

The world's second largest single-dish radio telescope, once used to contact E.T.

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.

This small primate research island is teeming with playing, fighting wild monkeys.

On a small Puerto Rican island, banks of secret naval bunkers lie abandoned and filled with piles of office equipment.

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

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

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

The legendary building that needed ghostly approval before being built.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Once a purveyor of Santeria supplies, religious products , and household sundries, now closed.

A cave's rare beauty held a cavernous secret hidden underground.

This is one really big nut.

A museum dedicated to the alleged Roswell Incident.

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

An immersive art experience built by local arts collaborative, Factory Obscura, in the building formerly known as The Womb, a psychedelic arts center founded by the frontman of the Flaming Lips.

Behind the Cowboy Hall of Fame is a burial ground for good horses and a famed rodeo bull.

Celebrate the history of the rich and truly misunderstood relationship between man and pigeon.

A museum honoring Oklahoma military service, where you can look into Hitler's mirror and see a Mickey Mouse gas mask.

Collection of skeletal systems from the "world's leading supplier of osteological specimens."