The "Seinfeld" diner.

Ride the subways of yesteryear.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

A celebration of capitalism in Midtown.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

New York City's smallest piece of private property.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

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

Art in the form of a winding, man made crack in stone.

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

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

A man-made island in scenic San Francisco Bay.

The miraculous hydrant that saved the Mission District in 1906.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

Nuclear waste dump site now an environmental sanctuary.

Golden Gate Park's historic collection of plants.

Gold Rush-era tombstones line the park's paths.

A monument to the love people have for their pets.

A Barbary Coast watering hole built into a Gold Rush shipwreck.

This shop and studio is dedicated to the art of the book, from letterpress to bookbinding.

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

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

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