Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.

A onetime gangsters' hideaway where you can dine on steaks, fine wines, and cigars just like they once did.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

A hidden grotto on the grounds of the Kane County Government Center.

Urban explorers embraced America's now demolished first suburban mall, south of Chicago.

The NBA player's elaborate former home is now a ghost of its old glory.

This national park dedicated to the tallgrass prairie ecosystem still displays its military past.

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.