From the record
“Whitney Goff Round Barn near Winfred, South Dakota, United States, is a round barn that was built in 1915. It was listed on the National Register of Historic Places in 2004.”
Wikipedia article J. Whitney Goff Round Barn, CC BY-SA 4.0.
One of 16 National Register listings published here for Lake County · listed in 2004 · category: Building.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service