We love visiting the San Francisco Room and Board, not just to look at the furniture, but to check out their great front walk - concrete impressed with eucalyptus leaves.
We imagine this would be a pretty easy thing to recreate if you were pouring a cement patio or walkway - when the cement is very, very wet, sprinkle some leaves (or anything, really) over it, press them in, and wait for the whole shebang to set up. Instant point of interest, without the need for expensive stone.
• Look!: Leaf Impressions in Cement