dryfj.com / drycyclist.com

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Entering the Tough Nut Mine tunnel An open tunnel at the Tough Nut MineThumbnailsAnother view of the Tough Nut Mine siteAn open tunnel at the Tough Nut MineThumbnailsAnother view of the Tough Nut Mine siteAn open tunnel at the Tough Nut MineThumbnailsAnother view of the Tough Nut Mine siteAn open tunnel at the Tough Nut MineThumbnailsAnother view of the Tough Nut Mine siteAn open tunnel at the Tough Nut MineThumbnailsAnother view of the Tough Nut Mine site

The entrance appears to be made of some kind of poured concrete, which leads to the excavated tunnel into the earth inside. I wonder if that drum of acetone still contains acetone...

I don't continue any further into the tunnel than this, as alluring as it may be.