After hearing the sad news that Corn Circles, Tunnel & Plague
has been cancelled and not wanting to import each expansion individually, I made my own Corn Circles expansion with 6 new tiles. Each has a unique layout that's not, insofar as I know, found in any existing expansion.
The road continues across the bridge, and the field continues under it.
The corn separates the field. The road continues under the city.
The corn separates the field, but continues under the bridge. You may not place a farmer on the little sliver of farm at the bottom of the tile.
(my house rules) - you may not place a farmer on the field covered by the corn.