Iowa is home to one of 49 federally designated heritage areas that interprets farm life, agribusiness and rural communities, both past and present, in integrative ways. Called Silos & Smokestacks, the heritage area is celebrating its 20th anniversary this year.

The preserved area in Iowa tells the story of American agriculture and its global significance. Within the Silos & Smokestacks area, which covers central and eastern Iowa, are many...