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)
I would add also Sepp Hozler farm in Austria, well he is a famous ambitious permaculture person, with some genious and crazy ideas. I visited his place and I really find it amazing (no overstatement!).
I also visited and enjoyed the highly biodiversity spots of Martin crowford forest garden in Devon, UK, and Plants for a Future project in Cornwall, UK.
Then, I also like the small urban gardens of Path to the Freedom, even though they are labelled as "permaculture", and the one from Eric Toensmeier, which is a leading expert in perennial vegetables, so he created with a friend a fantastic small urban permaculture house garden.
in Portugal, sheltered terraces facing eastwards, high water table, uphill original forest of pines, oaks and chestnuts. 2000m2
in Iceland: converted flat lawn, compacted poor soil, cold, windy, humid climate, cold, short summer. 50m2
Screaming fools! It's nothing more than a tiny ad: