What are some old/abandoned industrial sites?

[GS Noob]

I'm looking to make a list of some cool old/abandoned industrial sites to ride to. Stuff along the lines of Shelby Ironworks and Brierfield Ironworks where you can get off, walk around, possibly take some pictures of your bike in front of cool stuff. What else is there in Alabama like this?

Thanks

[jrobinson]

The Pumpkin near Athens

[BamaPhill]

The Pumpkin near Athens

Do you know if you can access this site, or it is posted no trespassing? 

[jrobinson]

I don't remember seeing any signs when I was there 3-4 years ago.