Gargoyle head that brings good luck.

This poignant art installation raises awareness of violence against women.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

A classic advertising icon immortalized in regal bronze.

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

Visible below the waves are memorials to the city's Gold Rush dead.

Once the fastest ship from San Francisco to Tahiti, the Galilee now lays in pieces in three different cities.

At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.

A huge musical instrument played by the ocean.

Early prototype for Frank Lloyd Wright's Guggenheim.

A modest reminder of treacherous waters at the Golden Gate.

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

The key to turning shifting dunes into the green oasis of Golden Gate Park.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

Home to one of the world’s largest collections of model yachts.

Approximately 250,000 people left homeless by the great earthquake and fires found shelter in Golden Gate Park.

Once the site of speeding horses, now home to picnickers and public concerts.

The remains of a ruined mansion memorialize the 1906 earthquake.

A monumental cross hides in the trees in Golden Gate Park.

Thirteen trees representing the original thirteen colonies were planted with soil from historic Revolutionary battlefields.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

San Francisco’s century-old Christmas Tree.

England's most famous front door has an accidental doppelganger.