Radioactivity still cause for concern at this urban explorer's paradise.

Overflowing with shipping containers, this location has been transformed into a massive workspace for artists.

A 140-year-old castle with underground caves hidden in San Francisco.

An enormous artwork that colorfully celebrates over 150 years of US military achievements.

Deco Modern sculptures of the people of the Pacific, cast for the 1939 Golden Gate International Exposition.

A man-made island in scenic San Francisco Bay.

Check out a shovel along with your Shakespeare.

Worker-owned cooperative and resource for those looking to lighten their ecological footprint.

An vast warehouse of everyday treasures in Berkeley, CA.

One man's prolific, decade-long quest to turn trash into artistic treasure.

A shape-shifting buy-sell-trade bookstore, born to Beatnik Era spirit.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

The only museum of sake in the United States is nestled in an unlikely California college town.

A pier that used to act as a busy ferry dock is now a decaying favorite of local fisherman and urban artists.

A 90-acre park on former landfill that hosts an annual kite festival.

A 10,000-square-foot museum of operating model trains.

Abandoned landscape once home to "the world's largest winery."