A century-old network of freight tunnels underneath the city's historic business district.

A Museum of Holography frozen in 1974.

The oldest experimental corn field in America is still creating better ways to grow crops.

In the Shawnee National Forest, amazing rock formations peer through the treeline.

An amazing collection of scale model ships.

This abandoned 19th century orphanage started as a boarding school for children of Civil War veterans.

Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

A notorious Route 66 eatery once frequented by Al Capone.

An avant garde art museum at the University of Chicago.

First planned industrial community in the United States.

What may be America's largest classic video game arcade lurks inconspicuously in a Chicago suburb.

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

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

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

The subtle science of a master molecular gastronomist.

An enormous park-like oasis, full of famous Chicagoans' graves.

The building is topped by a Statue of Liberty statue whose torch has stayed burning since the museum opened.

This elaborate estate contains a stunning marble aviary, a sunken conservatory, and a magnificent music room with a two-story pipe organ.

The body of one of the world's most famous outlaws is covered in cement and iron to prevent it from being stolen.

A modern-day wunderkammer dedicated to Indianapolis history, Afrofuturism, and musical vibrations.

A medical facility that has been kept frozen in time.

The longest navigable underground river in the United States is home to countless blind and albino animals.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.