This is Willow Shade, her childhood home, which is almost 250 years old and is privately owned.
I really enjoy the novels of Willa Cather. I have read quite a few including My Antonia, O' Pioneers, Shadows on the Rock, Death Comes for the Archbishop, A Lost Lady, Lucy Gayheart and the book mentioned above. I highly recommend her as each book is uniquely different. She has a strong sense of "place" in her novels; her geographic settings play a significant role in the stories. That is why it was so meaningful to read about and actually see the house in which she grew up.