Cave of the Mounds-National Natural Landmark
Blue Mounds, Wis.
Cost: $15, $7.50 kids, free kids 3 and under.
Hours: Monday-Friday, tours on the hour, 10 a.m.-4 p.m.; Saturday-Sunday, 9 a.m.-5 p.m.ast tour 5pm)
Open year-round and for all ages, this natural limestone cave offers guided tours daily on paved and lighted walkways. Tours pass colorful crystal formations including stalactites, stalagmites and columns. The caves are 50 degrees year-round. While on the grounds, enjoy the Gemstone Mine, butterfly gardens, fossil dig and picnic area. Birthday party packages available.