The fully guided underground cave tours are all upright walking with no bending over, or steps.  You do not get your clothes dirty.  The entire tour route is under electric lights.  Maribel New Hope Cave has more upright walking passage than any other cave in the entire Eastern half of Wisconsin!  Better yet, the show cave tour route has been extended more due to constant digging and exploration by volunteers with the non-profit Wisconsin Speleological Society.   Out of about 400 caves in Wisconsin, only five are currently open and being shown to the public.