It houses the remains of a 17th-century version of the Titanic.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Old Danish castle immortalized in Shakespeare's Hamlet.

Four miles of pipelines form the model of still-functioning retro-tech efficiency.

Oldest building in California still in use.

A world-class observatory in the California desert.

A 1920s speakeasy that had rum runners racing up and down the shores of California.

A burnt orange monolithic dome structure perched on a hillside near Interstate 280.

Rodin's famous depiction of Dante's 'Inferno', amidst a sculpture garden of many of his other works.

Concrete strongholds stand guard over the Golden Gate.

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

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

Floating man-made island and upscale restaurant.

A man-made island in scenic San Francisco Bay.

Where the alchemists dream of transmuting base metal into gold was actually achieved.

The only museum of sake in the United States is nestled in an unlikely California college town.

A store that sells all manner of bones, insects, and animal curiosities.

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

Furniture tries to escape an abandoned building in San Francisco.

A nondescript building that's been functioning as a speakeasy for nearly a century and a half.

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

A masterpiece in Golden Gate Park by virtue of the artist’s debt.

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

A hidden subterranean installation offers a view of the sky.