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

Concrete strongholds stand guard over the Golden Gate.

One of the last remaining Carpenter Gothic churches is situated on a wildflower conservatory overlooking the bay.

Frank Lloyd Wright died a year before construction on his largest public project even began.

'Cause the fence start shaking, the earth was quaking.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

An enchanting tunnel of cypress trees leads to an old morse code station still used today.

Built by the inventor of the radio, this abandoned hotel has housed early radio employees, military men, and a dangerous cult.

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

The fossilized remains of ancient California redwoods.

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

The haunting ruins of Jack London's dream house.

This California family's ancestral melon is sold only here.

340 bicycles, 65 feet high.

Believe it or not, this is the final resting place of the man who created the Odditorium.

A tribute to the life and work of the beloved "Peanuts" cartoonist.

Hand-powered race of alternative forms of transportation.

Monumental sculptures of Patrick Amiot, constructed from debris, detritus, and determination.

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

The southernmost outpost of the Russian Empire in colonial America.

A local dialect born in the late 19th century is only spoken in this isolated California valley.

A raised boardwalk winds through a thicket of stunted, century-old trees no more than nine feet tall.

A trash dump made beautiful by nature's power.

An optical illusion found amid a logged redwood forest.