Balbas says:

Surely you’re not suggesting this is the work of mere humans? No terrestial technology exists yet for these “overnight wonders” to appear amongst our croplands.

My own research suggests static electricity discharge via interdimensional fusion power fields: depending on power output, the field patterns (with some randomization code entered by the UFOnauts) create the mazes.

As with the TV station, however, they can do requests.

BubbaRay says:

Some of those covered so many acres I had a good time figuring them out with an aerial view. I suppose I’d need a Segway, a tent and 2 days food and water to tackle them on the ground. I notice some even defeated the old “always turn right” premise with endless loops.

Very nice find, Uncle Dave.

Here’s the world’s longest hedge maze:
http://www.longleat.co.uk/attractions/hedge-maze.html

AdmFubar says:

damn, i wann play pac man on all of them… when do we start???