Golden Gate Park's historic collection of plants.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

Concrete strongholds stand guard over the Golden Gate.

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

San Francisco's newly reopened hands-on science museum.

The rusting remains of the largest assembled WWII fleet on the West Coast.

I Street Bridge is the heaviest swinging center bridge in the United States.

Dentist's hated concrete colossi are now beloved icons of the community.

The beauty and the beast of hydraulic mining is on full display at this California Historic State Park.

Downieville's largest Gold Rush structure still standing has one of the longest bars in California.

The first U.S. town to secede from the Union, only to vote themselves right back in.

A fine mixture of the old and the new topped with an art deco neon spire.