Border columns made with wood post placed in flower beds close the walk are beautiful, add lots of interest to the garden Place a big container of pretty flowers on top of the post. maybe could use pvc pipes w flower basket set on top?
Japanese garden style is just perfect for small gardens. The tiniest space can fit a small Japanese garden. Japanese houses make the most of every bit of garden space, and often have small gardens squeezed a long a narrow pathway, or between two.