Astronomers plan to launch a space telescope into orbit, to find out what exactly stands in the way of an asteroid hitting Earth.

One man's love of natural beauty led to the creation of this hidden granite monument.

Discover for yourself what Herb Caen referred to as "the best kept secret in the Bay Area."

A living time capsule of the 1960s Richardson Bay water-front.

Concrete strongholds stand guard over the Golden Gate.

Ride on a fully-restored Nike nuclear-tipped missile elevator from the Cold War.

Internationally-recognized arts center housed in a century-old former military barracks.

This lighthouse has been guiding shipping into the Golden Gate since before the American Civil War.

The grand, column-fronted, sculpture-adorned home of the ambitious digital library.

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

A monumental cross hides in the trees in Golden Gate Park.

A large instrument played by the wind.

Eccentric sculptures made from repurposed materials peppers this former farm.

The fossilized remains of ancient California redwoods.

California's own majestic geyser is powered by a subterranean volcano.

This historic California cemetery holds the bodies of veterans of both the Civil War and the Donner Party.

A veteran Disney animator turned his gift for storytelling to a museum devoted to his love of a California city.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

This California museum is home to one of the largest collections related to the 'Treasure Island' author.

The haunting ruins of Jack London's dream house.

The unedited photograph called "Bliss" has graced the screens of over a billion computers.

This world-class vineyard has a peculiar collection of contemporary sculptures scattered across the property.

A tribute to one man's legacy of improving the accordion's reputation.

A poignant memorial to a young boy whose death spurred a dramatic increase in organ donations in Italy—dubbed the "Nicholas Effect."