Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

The legendary building that needed ghostly approval before being built.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

This jewel of an engine is one of Northern England's finest surviving legacies of the Industrial Revolution, even catching the eye of Henry Ford.

A tribute to the artist and activist who created the rainbow pride flag.

This museum explores the history of the book, from scrolls to mass-produced objects through tools, stories, and massive cast-iron binding machinery (some of it operational).

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

The first AIDS memorial chapel in San Francisco and one of only a few in the U.S.

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

Appropriation-friendly collection of books, periodicals, and more.

The grand, column-fronted, sculpture-adorned home of the ambitious digital library.

A library and museum dedicated to typography.

This shop and studio is dedicated to the art of the book, from letterpress to bookbinding.

In this century-old literary safehouse, print is alive and well.

This small New York museum examines Chinese history from its origins right up to its arrival in the city.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

In the back of a nondescript sports bar is a museum-worthy mural by legendary cartoonists.

The artist and New York City icon lived, worked and died in this converted carriage house owned by another iconic artist, Andy Warhol.

A staggering collection of photographs depicting medical, social, and historical change.

A favorite haunt of dinosaur loving children and hallucinogen loving hippies alike.

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

Its buzzing collection honors vibrator history.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.