Herb spiral
When we were doing up our kitchen a few years ago we bought in some pieces of slate and when the job was finished there were lots of small pieces left over. Alasdair decided to make a herb spiral and it was very successful both aesthetically and as a useful addition to the garden.
We have sage, two kinds of thyme, rosemary, chives, parsley and marjoram and, as it is just outside our door it is very handy.