📜 The Joliet Iron and Steel Works was once the second largest steel mill in the US, operating from 1869 to the 1980s. Today, it is a 52-acre historic site with modern ruins, open to the public for exploration. Operated by the Forest Preserve District of Will County. # Why Go 🔍 Explore fascinating industrial ruins and foundations 📚 Learn about iron and steel making history through interpretive signs on a paved trail 🚶 Enjoy hiking, biking, cross-country skiing, snowshoeing, in-line skating, wildlife viewing 🧺 Picnic facilities available 🐾 Pet-friendly environment # Why Avoid ⚠️ Underground areas were filled in due to instability # Tips 🗺️ Access to the I&M Canal Trail # Hours 🕒 Daily, 8 a.m. to Sunset # 🅿️ Parking Free on site parking available off Columbia street. # 🚻 Restrooms Available on site.