Not sure if this is art, craft, or gardening. Pebble mosaic "carpet" is beautiful. For this pebble-mosaic patio, the author modified a classic Persian carpet design to represent the creation of the universe.
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.