Reuse an old tree to make a log pathway in your garden. Good use of "yard" trees and other wood that can't be milled; works much better in climates without termites. Good drainage under the log rounds will make the path last longer.
If your deck or patio is partially covered, drape lengths of fabric or canvas between the joists to create shade. Space out the pieces of fabric for a more transparent look, and add lights to illuminate the space at night.
Maybe we can make some waterfalls to help with the traffic sounds Giant Copper Rain Shower Wonderful Water Feature Design! Imagine this Giant Copper Rain Shower in your garden on hot summer days it would be just awesome!