Show caves -- Wild caves -- Iowa caves -- Wisconsin lead, zinc, copper and iron mine sites -- Michigan's upper peninsula copper and iron mines -- Railroad tunnels -- Underground spaces: people and products -- Museums and underground exhibits.
Summary:
"Provides an up-to-date listing of the state's most publicly accessible caves, former mines, and other subterranean treasures. Whether you are a sport caver, researcher, or vacationer, this guide offers unique travel destinations, suggests possible study projects, and points to both widely known and less familiar underground locations"--Back cover.
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.