Etowah River Mine Tunnel in Georgia

Safety first, right? Found a place that I'd love to magnetfish, but that I don't have the guts to actually go to. Wanted to share, in case any of you were more fearless than I; if you do explore this water tunnel, please share!

It's an old mining tunnel dug in the 1800s in order to divert water so miners could retrieve gold from the river bottom. There's a video at the bottom of the article to show you what it's like to kayak through it.
Article on the passage here.

More specific directions to this area are in the article's comments.