6. Gary Works Steel Mill (Gary, Indiana)
The Gary Works Steel Mill was once the world’s largest, fueling the construction of America’s iconic skyscrapers. While portions of the mill remain operational today, vast swathes have fallen silent, their looming structures casting long shadows over Gary’s landscape. These abandoned sections have become powerful symbols of the city’s industrial rise and subsequent decline. Yet, efforts to repurpose and revitalize the area are underway.



