Outdoor fireplace, tiered landscaping, and curved path. The raw Copper path lights that will patina over time will look great and unique for years to come. Having the low voltage landscape lighting make these backyard ideas picturesque day and night.
DIY Outdoor Solar Light Display : 2 fence posts + 4 solar outdoor lights + 8 extra long screws + an long scrap of treated x wood. great idea for the deck or patio! Would probably use nicer solar lights!
Pondless Backyard Fountain Pond and Waterfall. Even without the fountain, which in Az will grow algae like nobody's business, I think the idea of softening up the patio with a little rock garden with plants mixed in.