Where was the cornfield in Field of Dreams (1989) filmed?

The cornfield in Field of Dreams (1989) was filmed near Dyersville, Iowa.

Who is Chicago's O'Hare Field named after? The Chicago O'Hare airport is named for Edward Henry O'Hare,…
Was John Bardeen the only person to win two Nobel Prizes in his or her field? Yes. John Bardeen (b. 1908) won two Nobel Prizes in…
How many episodes of "The Honeymooners" were filmed and when did they first air? Thirty-nine half-hour episodes of "The Honeymooners" were filmed, usually referred…
How many times has the story of Baron Munchausen been filmed? The story of Baron Munchausen has been filmed three times,…
Where was Bridge on the River Kwai (1957) filmed? The Bridge on the River Kwai was filmed in Ceylon…
What director filmed the biography of Karen Carpenter entirely with dolls? Todd Haynes filmed the biography of Karen Carpenter entirely with…