The remains of an abandoned dinosaur theme park litter the woods just off the highway.

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

Roses and other fascinating flora fill this garden built to commemorate Britain's immortal Bard.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

A Museum of Holography frozen in 1974.

A lush green oasis in the middle of Chicago.

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

A science teacher's dream.

Built to house a chapter of the Knights Templar, this grandiose building is a relic of Freemasonry in Chicago a century ago.

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

A factory in Milwaukee where poop is reclaimed… and recycled.

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

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

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

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

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

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

Where Cusack's record store from the film "High Fidelity" was located.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

Odd, decrepit fountain honors Chicago author who had mixed feelings about his hometown.