Three plaques mark the spot where the "forgotten father of broadcasting" worked.

From the Difference Engine to the Cray-1, all under one roof.

A plaque outside the San Jose airport commemorates the insect's arrival to the West Coast.

Chevron maintains one “Standard” brand station per state so it doesn’t lose the trademark.

Gold Rush ship-turned-hotel buried underneath San Francisco's financial district.

The neighborhood church casts a breast-shaped shadow that locals have come to call the “two o’clock titty.”

The oldest Naval chapel in the United States is home to an incredible collection of Tiffany stained-glass windows.

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

This odd California folly seems like it was almost designed to accumulate urban legends.

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

A psychedelic labyrinth on the San Francisco bay.

Staircase winds down the side of Telegraph Hill through gardens, wild parrots flying overhead.

A speck of nature and art in one of San Francisco’s most notorious neighborhoods.

These subterranean storage areas hold emergency water reserves.

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

This contorting sculpture is the tallest in San Francisco.

San Francisco's oldest surviving monument and meeting place for 1906 survivors.

A pair of mutilated bronze octopuses slump at the base of the monument honoring California's admission to the U.S.

One of few lasting examples of the brief octagon craze that developed into folly.

The southernmost outpost of the Russian Empire in colonial America.

The rest of him lived another 61 years and was buried elsewhere.

A two thousand year old brothel uncovered in Northern Greece.

'Cause the fence start shaking, the earth was quaking.

Internationally-recognized arts center housed in a century-old former military barracks.