This massive redwood tree has a hole in the base big enough to drive through.

From the Difference Engine to the Cray-1, all under one roof.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

A remote crossroads honoring a fallen talent.

The abandoned personal amusement park of the King of Pop.

A New England-style lighthouse along California's beautiful Highway 1 gets a re-do.

The peaceful gravesite of a rugged wild west gunman echoes the touching story of his last days.

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

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

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

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

Gold Rush ship-turned-hotel buried underneath San Francisco's financial district.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

Furniture tries to escape an abandoned building in San Francisco.

Its buzzing collection honors vibrator history.