I hail from minnesota. I'm a bit of a research nerd and found information on caves exploring a completely different subject but became very interested. i've visited the tour caves here in minnesota, as well as one or two others on the nss register as well as a couple in illinois and iowa. My main point of interest was once hard rock mines but lately i've been loving natural rock formations.
I hope to contribute and learn what i can from all of you, cheers.