Nature and history come together for an event at Ha Ha Tonka state park this week. October 20th is Castle Day at Ha Ha Tonka. The day will include crafts and other activities for kids, demonstrations on life in the Ozarks, a photo-walk featuring images of the Snyder estate prior to 1942, and more. Castle Day events will last from 11am until 4pm. More details can be found online at www.mostateparks.com or by calling 346-2986.