A few years ago I helped my parents build together a focal point in their yard. It is made of two concentric circles of decorative concrete retaining wall, with the center circle taller than the outer one. The circles serve as a central location in the yard for some garden pathways. In the center ring is a weeping cherry tree that provides beautiful spring flowers. The outer circle is home to mums in the fall and often holds pansies. You could easily plant any type of annuals or perennials in the circles. A focal point could be anything from walls and fences to fountains and trellises. It would be fairly simple to create an elegant fountain or water feature in place of the weeping cherry tree. The sky is the limit! Just use your imagination.