Neoclassical Revival mansion and set of horror cult classic Phantasm.

A playground built by the kids that is a child's wonderland, and a helicopter parent's nightmare.

Playable, historic pinball machines fill this Alameda museum.

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

A walk-in working camera obscura produces 360-degree live images of the San Francisco coast.

An enormous illuminated figure dances on the Las Vegas strip.

A man-made island in scenic San Francisco Bay.

A winding path built in secret on the edge of the continent.

Perfect your fly fishing technique on their practice ponds.

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

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

Golden Gate Park's historic collection of plants.

A classic advertising icon immortalized in regal bronze.

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

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

An overlooked and unassuming engineering marvel.

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

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

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

Faceless white figures loom over the city from the rooftop.

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

These subterranean storage areas hold emergency water reserves.

A tree bears footwear on the loneliest road in America.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.