For background information about this project see my post entitled The Carrie Furnace Project.
To hear the 1-2 minute audio content click on the link below the picture, which will open the audio content in a separate page.
This post’s audio content describes the incredible size of the pipes that are seen in the image.
The Carrie Furnace Project
Copyright Howard GrillPittsburgh, projects, The Carrie Furnace