This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

Once the largest windmill outside of Holland, with enormous 114 foot sails.

Guns that have been defending San Francisco since 1904.

The taxidermied remains of the "last wild grizzly bear in California" and of the symbol of the state of California.

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

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

Faceless white figures loom over the city from the rooftop.

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

A garden oasis filled with flowers mentioned in the works of William Shakespeare.

Join the circus for a few lessons to learn clowning, acrobatics, and Chinese contortion.

A famous alternative culture epicenter and where Joplin serenaded young hippies.

Over 315,000 preserved amphibians and reptiles in jars.

A man-made island in scenic San Francisco Bay.

San Francisco's oldest operating hotel, with a Victorian atmosphere and a "haunted" fourth floor.

The remains of a 12th-century chapter house in Golden Gate Park.

The miraculous hydrant that saved the Mission District in 1906.

This print shop boasts one of the largest pinball arcades in San Francisco.

Tenacious mummies survived dental problems, eternal entombment, and more than their fair share of devastating fires.

A monument to the love people have for their pets.

A promotional sun clock on the site of San Francisco's great raceway.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

This partially buried wreck is one of the most complete of its kind but is only revealed when the sea allows.

An overlooked and unassuming engineering marvel.

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