Okoboji Auto Museum
Lake Okoboji is a popular vacation and recreation spot in northwest Iowa, including an amusement park named Arnold’s Park. It has some beautiful old cars in it, along with recreations of storefronts and the way Arnold’s Park looked in the ‘50s and ‘60s. The Roof Garden was a well-known dance hall, drawing people from long distances to dance to big-name rock & roll bands.
http://www.okobojicc.com/the-occ-experience.php