This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

This historic hotel invented the chocolate brownie.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

All of Chicago's wood-paved streets are long gone but two alleys remain.

Nonprofit art center that promotes outsider, intuitive, and self-taught art.

A science teacher's dream.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

The subtle science of a master molecular gastronomist.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

An antiquated German apothecary on Chicago's North Side.

A monument to the art of slicing people open.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

A speakeasy takes on Chicago's drinking culture.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

The last Americana on Route 66.

A black and white painted wall creates an optical illusion in the California desert.

9,000 square feet of vintage and modern mechanical toys, dioramas & sideshow curiosities.

In the middle of the desert, miles from any human life, sat an anomalous pay phone that still magically answers your calls.

The old Niles Canyon Aqueduct in the San Francisco Bay Area is a bemusing and secret trail through nature for wayward travelers.

A sculpture dedicated to Napa Valley's oldest mineral water company.