I'd go with a stand of trees at the end of the garden - fast growing biomas willow or eucalyptus which you could use in a few years for firewood, an area of lawn with some nice flower beds and definitely a herb & veggie patch. Keep the herb/veggie patch close to the house so that you can just nip out and cut a fresh lettuce for dinner or grab herbs as needed - if it's at then end of the 120 foot garden you might tend to forget about it. Stick up a bird box and a couple of feeders to keep them away from your veggies!!