A huge musical instrument played by the ocean.

A modern mechanical planetary system, part of a 10,000 year clock.

Dive bar built out of the remains of a whaling ship.

The longest burning light bulb in the world.

Neoclassical Revival mansion and set of horror cult classic Phantasm.

A creepy steel gremlin has protected the Bay Bridge since 1989.

An abandoned, unfinished mansion on grounds strewn with lava rocks.

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

The memorial to the victims of the Jonestown Massacre carries the names of 918 lost, including one name people wish wasn't there.

Julia Morgan's Moorish-Gothic labyrinth of fountains, trees, natural light and Oakland's notable dead.

Odd stone and concrete monuments in the "Poet of the Sierras" eclectic folly garden.

Of all the origin stories for weed's secret code, this one likely has the goods.

An amazing collection of fantastic reptiles, amphibians, spiders, and insects.

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

This subtle Berkeley paving stone actually marks off a lawless tube of air that extends into space.

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

A huge work of Burning Man-inspired outsider art on the grounds of a California winery.

A storybook European village in Berkeley.

An abandoned car and strange wooden debris are among the scattered remains of the old sand and gravel quarry.

Home of what was the largest hydraulic mine in the world, producing gold and the first diamonds in the U.S.

340 bicycles, 65 feet high.

Thousands of crosses and markers for soldiers who lost their lives in Iraq and Afghanistan blanket a California hillside.

The only theatre in the world constructed specifically for sound movement.

Half of a house.