The karst areas of Wisconsin are located along the eastern and southern border of the state. Silurian and Ordovician dolomites cover large areas in the southern corner of the State. Several show caves are located here. But spacious caverns are rather rare and the speleothems are not comparable to those of other states. The interesting features of those caves are their sediments and solutional features like the profiles of the passages. A rather small area of Ordovician Prairie du Chien dolomite is in the western corner of the state. Here is another show cave of the state located, Crystal Cave.
The central part of the state is Cambrian sandstone and in the north are even older Precambrian igneous and metamorphic rocks showing no caves at all.
 Badger Mine and Museum
Badger Mine and Museum Crystal Cave
Crystal Cave Eagle Cave
Eagle Cave Kickapoo Indian Caverns
Kickapoo Indian Caverns Ledge View Nature Center
Ledge View Nature Center Maribel New Hope Cave
Maribel New Hope Cave Milton House
Milton House Cave of the Mounds
Cave of the Mounds Platteville Mining Museum
Platteville Mining Museum St. John Mine
St. John Mine Witches Gulch
Witches Gulch