Download or read book Wisconsin Underground written by Doris Green and published by Big Earth Publishing. This book was released on 2000 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Details and gives directions to more than 20 accessible caves, including some in northeastern Iowa; descriptions of lead and zinc mines in Wisconsin and northern Illinois, and copper and iron mines in Michigan's Upper Peninsula; includes a guide to railroad tunnels and other underground spaces that were created for specific purposes, including beer and wine storage, human escape routes, and lead shot production.