Guided+tours+of+this+geologic+wonder+depart+regularly+every+day+of+the+year%2e+Tours+pass+a+stunning+array+of+colorful+crystal+formations+on+paved+lighted+walkways%2e+Cave+of+the+Mounds+is+the+premier+cave+in+the+upper+Midwest+and+the+jewel+box+of+America%92s+major+show+caves%2e%0d%0a%0d%0aVisitors+also+enjoy+our+Gemstone+Mine%2c+Fossil+Dig%2c+Butterfly+Gardens%2c+Amazing+Rock%2fGift+Shops%2c+Hiking%2fBiking+Trails%2c+Snack+Bar+and+Picnic+Area%2e+Birthday+Party+Packages%2c+Camps%2c+Events%2c+School+and+Scout+Programs+are+also+available%2e+Cave+of+the+Mounds+National+Natural+Landmark+is+located+in+southwest+Wisconsin+just+20+minutes+west+of+Madison%2c+off+U%2eS%2e+Highways+18%2f151%2e%0d%0a