I like the contrasting surfaces but not gravel because of Charlie. I also like the trelliswork on the right-hand wall. Chairs with cushions around brazier in small urban garden, clipped box balls, Mespilus germanica
The planter is basically a small raised bed. my version: a series of small mosaic beds in the side yard, separated with thyme, large urns full of cascading plants, & handmade hexagonal stepping stones.