The final resting place of the Emperor of the United States and Protector of Mexico.

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

The restored and active Victorian-era final resting place of San Francisco.

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

The miraculous hydrant that saved the Mission District in 1906.

This residential door allows San Francisco muggles a glimpse at the wizarding world.

Its buzzing collection honors vibrator history.

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

The randomness of this wall of lava lamps helps encrypt up to 10 percent of the internet.

This contorting sculpture is the tallest in San Francisco.

A library built during San Francisco's pioneer times is a student's retreat, bibliophile's sanctuary, and chess player's delight.

Early prototype for Frank Lloyd Wright's Guggenheim.

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).

In a grove of fast growing walnut trees outside Paris, Illinois, a marker shares the story of a fictional road building culture.

One of the first historical sites of an alternative universe was installed in the town of Paris, Illinois—which is now home to an annual spelling bee of Kcymaerxthaereal words.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

Cold War missile launch site which has been converted to a public park.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.

World's second largest particle accelerator, where nature reveals its secrets.

The famous author's birthplace is preserved in a town that he once described as narrow-minded.

A former atom smasher turned into an art gallery.

This bronze sculpture on a former squash court marks the secret origins of the Atomic Age.