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

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

The Internet Age began with a transmission from this biker bar.

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

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

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

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

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

At night, this glittering musical tunnel draws skaters and photographers.

A statue commemorate Tommie Smith and John Carlos's brave protest at the 1968 Olympics, a watershed moment for civil rights.

This 252 step staircase offers stunning views of San Jose.

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

A life-sized mammoth sculpture marks the spot where the remains of a Columbian mammoth were discovered in 2005.

One of the largest Marian shrines on the West Coast stands rather unexpectedly in Silicon Valley.

A giant chess set, minus the psychedelic drug trip.

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

This massive crater in the middle of nowhere was used to train astronauts for moon landings.

Graffiti, cars, and religion combine to create this jungle of scrap in the Nevada desert.