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.

A beautiful geyser under environmental threat.

This black sand beach was crafted from volcanic explosions including the historic Minoan eruption.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

Depicting scenes of everyday life - and specific individuals - in Great Depression era San Francisco.

Forgotten and then destroyed by fire, this was once one of the largest saltwater swimming pools in the world.

This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

Standing in for the first ship to navigate the Northwest Passage.

The key to turning shifting dunes into the green oasis of Golden Gate Park.

This contorting sculpture is the tallest in San Francisco.

A modest reminder of treacherous waters at the Golden Gate.

The rest of him lived another 61 years and was buried elsewhere.

A strange house built only at night, with rumored mystic inspiration.

A pair of pure white felines guard the entrance to a spot of California real estate established as an artist's haven.

The blinking light atop the iconic landmark has been sending secret messages for decades.

High on a hill overlooking Los Angeles lives a world famous, high-power conical Tesla Coil.

Home to a forest of whimsical pygmy Coast live oak.

Centuries of crashing waves carved out this small hole in the rock, which lights up at certain parts of the year.

Home to the "Circus" trees created by Axel Erlandson.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

Dedicated to the works of the legendary special effects artist.

The only road through the heart of Glacier National Park.

Art Deco stylings conceal the true nature of this bridge.