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IOWA, Clay County, Gillett Grove vicinity, Ross, Seymour, Round Barn (Iowa Round Barns: The Sixty Year Experiment TR), Off IA 374 (06/30/86)
IOWA, Clayton County, Millville vicinity, Round Barn, Millville Township (Iowa Round Barns: The Sixty Year Experiment TR), US 52 (06/30/86)
IOWA, Devis County, Bloomfield vicinity, Terrence Round Barn (Iowa Round Barns: The Sixty Year Experiment TR), Off IA 2 (06/30/86)
IOWA, Dubuque County, Dubuque, Round Barn, Dubuque Township (Iowa Round Barns: The Sixty Year Experiment TR), 2810 Cascade Rd. (06/30/86)
IOWA, Emmet County, Armstrong vicinity, Thomsen Round Barn (Iowa Round Barns: The Sixty Year Experiment TR), Off IA 15 (06/30/86)
IOWA, Fayette County, Arlington vicinity, Nus, August, Polygonal Barn (Iowa Round Barns: The Sixty Year Experiment TR), CR C‑2W (06/30/86)
IOWA, Fayette County, West Union vicinity, Grimes Octagon Barn (Iowa Round Barns: The Sixty Year Experiment TR), Off IA 56 (06/30/86)
IOWA, Floyd County, Charles City vicinity, Brooks Round Barn (Iowa Round Barns: The Sixty Year Experiment TR), W of US 218 (06/30/86)
IOWA, Floyd County, Charles City vicinity, Spotts Round Barn (Iowa Round Barns: The Sixty Year Experiment TR), IA 14 (06/30/86)
IOWA, Franklin County, Iowa Falls vicinity, Wood, Herman, Round Barn (Iowa Round Barns: The Sixty Year Experiment TR), US 65 (06/30/86)
IOWA, Greene County, Grand Junction vicinity, Frantz Round Barn (Iowa Round Barns: The Sixty Year Experiment TR), Off US 30 (06/30/86)
IOWA, Guthrie County, Jamaica vicinity, Octagon Barn, Richland Township (Iowa Round Barns: The Sixty Year Experiment TR), Off IA 141 (06/30/86)
IOWA, Hamilton County, Blairsburg vicinity, Oakland, William, Round Barn (Iowa Round Barns: The Sixty Year Experiment TR), Off US 68 (06/30/86)
IOWA, Harrison County, Pisgah vicinity, Haner, William, Polygonal Barn (Iowa Round Barns: The Sixty Year Experiment TR), CR L‑16 (06/30/86)
IOWA, Henry County, Salem vicinity, Holtkamp Round Barn (Iowa Round Barns: The Sixty Year Experiment TR), Off U.S. 218 (06/30/86)
IOWA, Howard County, Cresco, Polygonal Barn, New Oregon Township (Iowa Round Barns: The Sixty Year Experiment TR), Off IA 39 (06/30/86)
IOWA, Ida County, Cushing vicinity, Waveland Round Barn (Iowa Round Barns: The Sixty Year Experiment TR), Off US 20 (06/30/86)
IOWA, Iowa County, Conroy vicinity, Plagmann Round Barn (Iowa Round Barns: The Sixty Year Experiment TR), Off IA 209 (06/30/86)
IOWA, Jackson County, Bellevue vicinity, Dyas Hexagonal Barn (Iowa Round Barns: The Sixty Year Experiment TR), US 52 (06/30/86)
IOWA, Jackson County, Van Buren vicinity, Polygonal Barn, Van Buren Township (Iowa Round Barns: The Sixty Year Experiment TR), IA 64 (06/30/86)
IOWA, Johnson County, Sharon Center vicinity, Miller Round Barn (Iowa Round Barns: The Sixty Year Experiment TR), CR F‑62 (06/30/86)
IOWA, Johnson County, Sharon Center vicinity, Roberts Octagon Barn (Iowa Round Barns: The Sixty Year Experiment TR), CR W‑62 (06/30/86)
IOWA, Johnson County, West Liberty vicinity, Polygonal, Lincoln Township (Iowa Round Barns: The Sixty Year Experiment TR), Off US 6 (06/30/86)
IOWA, Kossuth County, Titonka vicinity, Longbottom Polygonal Barn (Iowa Round Barns: The Sixty Year Experiment TR), Off IA 226 (06/30/86)
IOWA, Marshall County, State Center vicinity, Dobbin Round Barn (Iowa Round Barns: The Sixty Year Experiment TR), Off CR S‑52 (06/30/86)
IOWA, Monona County, Mapleton vicinity, Round Barn, Cooper Township (Iowa Round Barns: The Sixty Year Experiment TR), IA 141 (06/30/86)