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

Haunting and beautiful trees, doomed to die.

Once America’s most beautiful army base, this abandoned military fort on the coast of Monterey Bay has been left to the elements.

More than 700 species live within this murky marvel of a swamp on California's coast.

An ominous concrete cube cuts a dystopian silhouette atop this California mountain.

This concrete ship has had four careers - World War I tanker, floating amusement park, fishing pier, and artificial reef.

Here, visitors can swing with the waves of the Pacific Ocean.

Once close to extinction, there is no shortage of elephant seals on the beaches of Año Nuevo State Park.

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

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

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

A giant chess set, minus the psychedelic drug trip.

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

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

Four miles of pipelines form the model of still-functioning retro-tech efficiency.

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

A Roman-inspired temple once controlled half of San Francisco's waters.

The black lab that was voted mayor of a California town is forever remembered by a life-size statue.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

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

San Francisco Bay's ghost town.

A giant can of fruit cocktail is all that remains of what was once the world's largest cannery.

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

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