I first heard about Permacuture from reading about it in my parent's copy of The Next Whole Earth Catalog back in the late 80's.
After years of dreaming about it I finally got some land on which to grow a food forest. Unfortunately, it's got kind of an unusual microclimate and soil type, so it's not really practical to grow lots of different things outside. Also there's a high risk of wildfire. So then I got the idea of making a kind of conservatory, basically a food forest under glass.