This contorting sculpture is the tallest in San Francisco.

The original place where water met land in the City by the Bay is outlined in brass.

Once the fastest ship from San Francisco to Tahiti, the Galilee now lays in pieces in three different cities.

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

A garden oasis filled with flowers mentioned in the works of William Shakespeare.

The first fresco Diego Rivera painted in the United States can be found in the former San Francisco Stock Exchange.

Faceless white figures loom over the city from the rooftop.

The only visible piece of San Francisco's most famous shipwreck.

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

The remains of a 12th-century chapter house in Golden Gate Park.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

This print shop boasts one of the largest pinball arcades in San Francisco.

The world's most famous donkey lives in this pen.

Thousands of years ago, Indigenous people painted images onto these canyon walls that are still on display today, provocative, mysterious, and enduring reminders of the people who lived here long ago.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

The pop art icon's gravesite is broadcast 24 hours a day on his museum's website.

Yo, Adrian!

The graffitied ruins stand hidden within the Pennsylvania woods.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

There aren't too many operational funiculars around, but Pittsburgh has two!