One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

An ominous concrete cube cuts a dystopian silhouette atop this California mountain.

A giant can of fruit cocktail is all that remains of what was once the world's largest cannery.

A pair of pure white felines guard the entrance to a spot of California real estate established as an artist's haven.

One of the largest Marian shrines on the West Coast stands rather unexpectedly in Silicon Valley.

This giant shopping mall still holds signs of its automotive past.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A giant chess set, minus the psychedelic drug trip.

The headquarters of a secretive order is also a beautifully-designed park.

An extensive collection of ancient Egyptian artifacts and mummies.

The oldest house in the capital of Silicon Valley.

The largest permanent Monopoly board makes one of the longest games even bigger.

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

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

This contorting sculpture is the tallest in San Francisco.

Only hotel where you can legally launder money.

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

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

A collection of 20th-century automata, penny arcade games, and musical contraptions.

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

This turn of the century masterpiece has a mysterious goaty interloper.

The oldest lawn bowling club in the United States.

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

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