Round Barns

The hip-roofed barn is probably the most common sight on the prairies, but the round barns also were built. If you click on the title you'll be directed to a web site that has many photos of round barns in North America. I don't see the one that I'm showing here, so it must be rare. It's located west of Moose Jaw, Saskatchewan.
Farmers built barns to keep their livestock warm and dry, especially in winter. The hayloft (upper storey) was used to store the hay which could be lowered to the ground floor as needed during the long cold winter months.
I really don't know the advantage of round barns. Perhaps someone has researched the rationale for building round barns. All I know is they are more difficult to build and make a great photo.
Farmers grew crops not just to sell but also to feed and bed their livestock. The grain elevator was a common storage place for their "exported" grain and their barns were the storage places for the feed for their animals. Different architecture for different purposes--perhaps these also should be candidates for the wonders of North America.