They aren't barns, but they are a big part of apple country, and sometimes they're stacked in piles as big as a barn. They're used for storing apples. Temporarily. So they're kind of like barns. Sorta... maybe.
Stacks of apple crates are growing in the field across the street from my house. Taken from the flatbed two at a time, like blocks, and set down to build fine jungle gyms perfect for teenagers to climb. (Ask me how I know...) Apple Crate Cities I called them.
More real barns can be found at Tom's Barn Collective.