The Higgins Museum, one of Okoboji's more unusual attractions, is devoted to the history of national banking in the United States from 1863 to 1935. Exhibits of national bank notes from Iowa and adjoining states illustrate the heyday of America's use of hometown paper money. An extensive collection of turn-of-the-century Iowa postcards and a numismatic research library, which is available for use by appointment, are also part of the Higgins Museum. The museum is on Sanborn Avenue in Okoboji, three-quarters of a mile west of Highway 71. Open daily, except Mondays, from mid-May through September, 11 AM to 5:30 PM. For group tours or research appointments, call 712-332-5859 or visit www.thehigginsmuseum.org.