Covered in tens of thousands of coats of paint, this Indiana attraction holds a world record all its own.

If astronomy had a ghost, it would look like this observatory.

A living time capsule of the 1960s Richardson Bay water-front.

With statues of Nelson Mandela and Harvey Milk this monument has been called the Mount Rushmore of California.

Concrete strongholds stand guard over the Golden Gate.

A large instrument played by the wind.

An enormous illuminated figure dances on the Las Vegas strip.

A man-made island in scenic San Francisco Bay.

The peaceful gravesite of a rugged wild west gunman echoes the touching story of his last days.

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

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

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

Faceless white figures loom over the city from the rooftop.

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

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

Alleyway plaque commemorating the death of a fictional character in The Maltese Falcon, not far from the author's home.

A modest reminder of treacherous waters at the Golden Gate.

Created in 1972, the famous sculptor's intricately detailed monument to San Francisco is overflowing with city landmarks.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

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

Furniture tries to escape an abandoned building in San Francisco.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.

A modern mechanical planetary system, part of a 10,000 year clock.