If you want to visit, here's the location.

https://maps.app.goo.gl/tvGDn6rruL5HKH5LA

You might also want to visit the Stumphouse Mountain Tunnel in SC (about 2 hours away because mountain roads are scenic but not fast). It was started being dug by hand before the Civil War as a railroad tunnel to connect Charleston SC to the Midwest but never completed.

https://visitoconeesc.com/stumphouse-park/

Clemson University used it for a while to age their blue cheese. They have more info about the history of the tunnel on their site:

https://www.clemson.edu/bluecheese/history.html