Adolph Sutro's little-known, geographically inaccurate, deprecated monument.

A man-made island in scenic San Francisco Bay.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

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

A historic hotel that made a cameo in Hitchcock's classic film has no intention of letting guests forget its fame.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A 140-year-old castle with underground caves hidden in San Francisco.

A psychedelic labyrinth on the San Francisco bay.

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

An unassuming grey box sitting on San Francisco's Pier 17 is a "sky diary" of the coastal city's temperamental weather.

A "miracle" that seems to produce more holy fistfights than holy revelations.

An overlooked monument to the celebrity gangster who helped put the sin in Sin City.

The U.S. military dumped millions dollars worth of goods off a beach in Vanuatu, purely to spite the British and French.

This 75-year-old Shakespearean sculpture is painted by a local artist for every season.

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 painted marvel is San Francisco's 400-foot ode to urban biking.

Built in 1906, this unique building was the first Hindu temple in the United States.

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

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

The only visible piece of San Francisco's most famous shipwreck.

One of the oldest producers of hand-folded fortune cookies still uses its original secret recipe.

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

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

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.