Quite a few, actually. Not as spectacular as Mammoth, of course. Cave of the Mounds and Crystal Cave are both popular tours, but there are caves dotted all over

Quite a few, actually. Not as spectacular as Mammoth, of course. Cave of the Mounds and Crystal Cave are both popular tours, but there are caves dotted all over the state (including access via the lake up on the north shore). Edit: link to the Wisconsin Speleological Society: https://www.wisconsincaves.org/home https://www.wisconsincaves.org/home