Until I drew MSP, I’d always assumed that concourses A and C formed basically one long straight line (represented by the white dashed line on the diagram below). I didn’t realize that they curved slightly to the south.
Now that I know to look for it, I can see the slight curvature when I travel through MSP, but the terminal is so long that it’s difficult to notice unless you’re looking for it.
Paul Bogard created these terminal silhouette illustrations, and has made them available for use under a CC BY-SA 4.0 License.