The Carrie Furnace Mill tour was interesting in a lot of ways, but could have been more. If you're looking for a combination of history, folklore, culture, this is good, but our guide was a little too into the engineering/technical aspects of how steel is made in extreme detail.
The sights were awesome-to see the size of the place and different parts of the property is something, and for a facility that has been shut down/decommissioned for 30 years, the rustic condition was interesting, bordering on questionable in terms of safety.
I read/heard from locals that there has been talk about developing the area immediately around the facility to make it more of a true historic site meant for tourists. A neat tour, but be prepared to spend 2-2 1/2 hours on your feet standing and listening much of the time.