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.
Attach a sheer curtain panel behind your existing curtains using a bungee cord. Just run the cord through your curtains, attach the bungee hooks to the sides of the rod and stretch it across, and voilà, you have a beautiful sheer inner curtain panel!