An abandoned factory along the Mississippi coated by a giant mural.

Locals dubbed this abandoned abode the "gingerbread house" because of its odd architecture.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

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

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

This grave in a ghost town cemetery marks the death of a witch on a day that never happened.

A late sculptor's last project was to turn this abandoned cement factory into a castle-themed amusement park.

One-layer pyramid in Indiana.

This stunning gothic ruin was a casualty of the Indiana steel industry crash.

The legacy of an unsolved, gruesome murder rests beneath the spans of this historic bridge.

An abandoned observatory in the middle of the Illinois prairie.