The world's first permanently occupied mountain-top observatory continues to report on the stars.

A classically inspired temple in Redwood City.

Subterranean house made out of a grain silo, located in the Santa Cruz Mountains.

This old-world mansion with lush gardens is a gem in the heart of Silicon Valley.

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

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

From the sky, a kaleidoscope of color brightens the grey landscape of the San Francisco Bay.

It is locally loved and ridiculed for literally looking like poop.

San Francisco Bay's ghost town.

The first high-tech company in the valley that actually worked with silicon devices.

This giant shopping mall still holds signs of its automotive past.

An extensive collection of ancient Egyptian artifacts and mummies.

The headquarters of a secretive order is also a beautifully-designed park.

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

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.