Mystery Hill

7611 US 12
Onsted, MI 49265- Map It
Phone: (517) 467-2517

AAA Editor Notes

Mystery Hill is at 7611 US 12 opposite Walter J. Hayes State Park. Twenty-minute guided tours are offered through exhibits that seem to defy the laws of gravity, such as water running uphill. A 19-hole miniature golf course is offered for an extra fee. Guided tours are available.
Tour $10; $8 (ages 4-12).
Hours: Tues.-Sun. and Mon. holidays 10-4 (also Fri.-Sun. 4-7), Memorial Day-Labor Day. Closed NASCAR Sundays. Phone ahead to confirm schedule.