With the touch of a button, you can read a randomly selected short story.

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

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

A Barbary Coast watering hole built into a Gold Rush shipwreck.

An overlooked and unassuming engineering marvel.

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

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

A 140-year-old castle with underground caves hidden in San Francisco.

An artsy hidden staircase leads to breathtaking views of San Francisco.

An outdoor sculpture park of giant pink robots and post-apocalyptic Christmas scenes.

Eco-village hidden in the foothills of the Alps that created a massive system of psychedelic underground temples.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

Illegal drag racing two stories beneath Chicago’s streets.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

In the fictional world of Kcymaerxthaere, this was the former home of the Marshal of Gravity and the site of his tragic death.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

A museum dedicated to exhibiting remarkable outsider art.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

A hidden alley in urban Baltimore is a haven for graffiti artists.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

A collection cataloguing one of the most brutal dictatorships in modern history.

Hundreds of pieces of ancient Taíno art cover the walls of this Caribbean cave system.

This replica medieval European village in the Dominican Republic was built by a Hollywood set designer.