A historic and oft-filmed prison stands in a Chicago suburb.

What was once the second largest steel mill in the US is now a sprawling complex of modern ruins.

This former nursery supplied plants for the creation of Chicago's largest park.

The final resting place of the world's first nuclear reactor.

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

These abandoned grain silos and tunnels are an urban exploration dream.

This cheerfully-named branch of the Chicago River is the fetid result of years of blood, entrails, and meatpacking waste.

One-of-a-kind preserved ruins of an abandoned 1880s church in Chicago's Pilsen neighborhood.

Home to a protest movement, a bombing, and a dramatic change in labor history.

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