I am intrigued by the potential of permaculture, a long held dream of mine (I have a lot of dreams) was to buy a piece of run down farm land and attempt to "restore" it.
Here's a promo video from Bill Molison, the Australian founder of the permaculture movement,
In it, Molison and others work to try and restore a piece of salted farmland near the dead sea, using organic permaculture techniques.