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.
Turn a small courtyard into a sanctuary by adding an outdoor hot tub! Fun view of spa pool from above. I would have a hot tub like this! It's private and looks so nice rather than those ugly big plastic things.