This little blue house pokes out over the campus of UC San Diego, seven stories high.

Gold Rush-era tombstones line the park's paths.

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

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

Art from the latest counter-culture; kids who dye their hair blue and believe the future will be a post-apocalyptic water world.

Abortion, prohibition, religion, war, and fear all play a part in the history of this idiosyncratic Pacifica castle.

A rough granite monument marks the spot where Europeans first caught sight of the San Francisco Bay.

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

The graffiti-covered remnants of a former triangulation station are balanced precariously on this California peak.

This stunning sea creature-shaped home blends into the landscape like a fantasy villa.

Half of a house.

A speck of nature and art in one of San Francisco’s most notorious neighborhoods.

The grave of America's 11th president is not in some grand monument but instead it's hidden away on the grounds of the Tennessee Capital.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

One Confederate statue that accurately reflects the ugliness of its subject.

This replica of the Greek structure is in the heart of Nashville.

Recovered from the brink of extinction, at home in the Financial District.

Longtime headquarters of controversial boys' club for the world's wealthiest and most powerful.

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

The taxidermied remains of the "last wild grizzly bear in California" and of the symbol of the state of California.

The stones that traveled from Spain to eventually become a holy place for San Francisco's nature worshippers.

An overlooked and unassuming engineering marvel.

The miraculous hydrant that saved the Mission District in 1906.

A museum befitting the city responsible for supplying the majority of the world's LSD.