Hard to say. Growing up on the farm here were many. I'll choose two.
1. In a hayloft the way the hay bales were stacked there was a tunnel maybe a foot wide and a foot high that went back 8 to 10 feet. A hen started laying at the end of that tunnel.
2. Same hayloft but above the corn crib. There was a wall about 10 feet high with hay stacked on top of it. A hen found enough of a hole 10 feet above the ground and about 15 feet away from the end of that stack of hay to make a nest. The only way she could get to it was to fly. The outside wall of that corn crib was slats. I had to climb those slats to collect the eggs.
That nest is one reason I laugh when I read on here that chickens can't fly very well.