A mysterious monument covered in a binary code marks the heart of tech.

The garage at the childhood home of Steve Jobs was a hangout for the founders of Apple, even if they never built computers there.

This odd California folly seems like it was almost designed to accumulate urban legends.

A rough granite monument marks the spot where Europeans first caught sight of the San Francisco Bay.

Another of California's unused Cold War missile defense complexes has become a graffiti gallery.

Guns that have been defending San Francisco since 1904.

At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

Inside this museum, the history of the Walt Disney Family empire is on full display.

A huge musical instrument played by the ocean.

Concrete strongholds stand guard over the Golden Gate.

Internationally-recognized arts center housed in a century-old former military barracks.

The largest drain hole in the world.

Napa's oldest building is now a Mexican restaurant.

The only parking meter in the entire town, it is surrounded by 100 free spaces.

At almost 1,000 years old, this is the oldest known door in all of Britain.

It holds a fabulously designed tribute to astronomer Edmond Halley.

The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

London's smallest police station is barely the size of a phone booth.

This long-hidden space above Westminster Abbey now displays the battle gear of the legendary King Henry V.

This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

A naturally mummified 2,000-year-old man.

A gruesome and mysterious ancient sculpture of a pagan deity from the Roman occupation of Celtic Britain.

This magnificently macabre shield shows the power of chivalrous love in medieval times.