Forestville/Mystery Cave State Park is located in southeastern Minnesota (Fillmore County) between Spring Valley and Preston. Entrance to the park is 4 miles south of State Highway 16 on Fillmore County Highway 5, then 2 miles east on Fillmore County 118.
To get to Mystery Cave: From the park take County Road 118 west to County Road 5. Turn left follow County Road 5 south for 2 miles. Turn right onto 180th Street go west 3/4 mile. At next intersection turn right onto Old Cave Road proceed north 1/2 mile to the Mystery Cave Entrance Road on the left.