Adam Kommel was perusing Google Maps, looking for open swaths of green one day when he accidentally stumbled across this field near Minden, Nebraska. It looks just like Nebraska, and a casual search finds little more information than what Strange Maps has:
The only other pattern thriving in this checkered landscape is the circle, touching the edges of many squares (as seen on the left of this picture): a sign of the popular method of centre-pivot irrigation. As pretty as that might look from the sky, all these squares and circles are practical first and foremost. This is not a topology of frivolity. Why lose a bit of perfectly arable land only to sculpt something as pointless as a map?
The mysterious Nebraska Field does not seem to have achieved even local fame. The town of Minden only boasts a Pioneer Museum, and each December hyper-decorates itself to defend its reputation as Christmas City.
Link | Here's the Google Map.
Beside many ponds are low areas of wetlands. That is my guess anyway from a farming background.
For more fun, look for the Colorado-shaped field in Colorado.
BTW, my best Nebraska joke: When the doctor give you 6 months to live, move to Nebraska — it will seem like an eternity!