Steel production at the turn of the twentieth century was difficult, dangerous, and necessary. Pittsburgh's Carrie Furnace aided immensely in this process, fulfilling much of the United State's steel demand. #ScienceChannel #MysteriesOfTheAbandoned About Mysteries of the Abandoned: The world's most incredible engineering projects are revisited to uncover why places full of mysteries and untold secrets are now abandoned ruins. Subscribe to Science Channel: https://www.youtube.com/channel/UCvJiYiBUbw4tmpRSZT2r1Hw About Science Channel: Learn about outer space, leading scientific exploration, new technology, earth science basics, & more with science videos & news from Science Channel. Find us on social: Facebook: https://www.facebook.com/ScienceChannel/ Twitter: https://twitter.com/sciencechannel Instagram: https://instagram.com/sciencechannel TikTok: https://tiktok.com/@sciencechannel