Seven ceramic sculptures are scattered around this California college campus.

Outsider art or homage to aliens?

Special tunnels built so that frogs won't be killed when crossing the highway.

This diner's a kitschy dreamland for anyone whose heart is stuck in the 1980s.

A working miniature city designed to teach kids about safety and presumably city planning.

Each summer, the migratory bats living beneath the bypass form "batnadoes" at dusk.

The last of a gourmet supermarket chain, this store helped spark California's Food Revolution.

Where the first "expert riders, willing to risk death daily" for the Pony Express were recruited.

A mesmerizing disco ball-like sculpture along the Sacramento River Walk.

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

This 19th century train workshop is a treasure trove of railroad history.

A replica of the first public theater built in California.

The California capital city once stood 10 feet lower than it does today.

An eccentric home stands out in an otherwise average neighborhood with mosaics, mini topiaries, and kinetic sculpture.

Puzzling...this tree looks like an assemblage of dismembered monkey limbs.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

There is no trying to fall in love with this Star Wars fountain, you just do or do not.

Its buzzing collection honors vibrator history.

A winding path built in secret on the edge of the continent.

This shop specializes in oddities and Victorian-inspired wonders.

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

An artsy hidden staircase leads to breathtaking views of San Francisco.

A huge musical instrument played by the ocean.