I think there are quite a lot out there, just by the look of the Google
search results for permaculture farms.
One of the best big ones I know of is
Ben Falk's permaculture site:
He has a wonderful talk online:
This image (below) is from the
Hale Akua Garden Farm in Maui, Hawaii:
The Lazy Gardener,
John Douglas, runs a permaculture farm in Panama:
The
Quail Springs Permaculture site also seems pretty big:
The
Ojai Permaculture site seems pretty big, too:
Just as important, I think we should take note of all the amazing small permaculture sites out there:
For example, Dr.Bob Randall made an amazing urban food forest; it is just so beautiful and productive.
Then there another amazing permaculture garden:
I do not think it is size that matters so much, but the fact that people are making a positive impact in the world. Let's
go do stuff! (I love that song)