Wisconsin Underground 
Subtitle: A Guide to Caves, Mines, and Tunnels In and Around the Badger State
Publisher: Trails Books
Published: September 1, 2000
Language: eng
Format: Paperback
Number of pages: 160
ISBN-13: 9780915024858
Subjects: Travel / United States / Midwest / East North Central (IL, IN, MI, OH, WI); Travel - United States; Travel; United States - Midwest - East North Central (General); Museums, Tours, Points of Interest; United States - Midwest - Wisconsin; Guidebooks; Underground areas; Wisconsin