A celebration of once forgotten materials.

From the sky, a kaleidoscope of color brightens the grey landscape of the San Francisco Bay.

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

One time home to turn of the century explosives, now hidden under the Bay Bridge.

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

A massive volcanic plug is now a protected area that hosts a number of bird species.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

Big gun installations, built over a massive cemetery, now abandoned & hidden in trees.

A modest reminder of treacherous waters at the Golden Gate.

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

The short oil boom of Venice Beach, and its swift removal from the tourism-laden landscape.

Two groundbreaking brothers from Pasadena.

A Masterpiece with a Tragic History.

A stellar example of Art & Crafts architecture, and a movie set to boot.

Sports history, made in the Arroyo Seco.

The American Home, Re-imagined.

From silent movie theater to rock &roll palace and beyond.

A century and a half of research in the sciences and natural history, still going strong.

The stately birthplace of California's statehood.

A decommissioned Naval base now rents itself out for people who want to blow stuff up.

This private residence was the template for one of the most beloved television homes of all time.

This sailor's boneyard was lost under a parking lot for decades before being rediscovered.

A classic advertising icon immortalized in regal bronze.

Quite simply the largest tree in the world (by volume).