Ashby Residence Walnut Creek, CA This Moraga garden revolves around a generous central water feature. The predominant materials are basalt stone, steel and concrete, which combine to create an unusual synthesis. Simple steel arbor structures are configured to mitigate the dominance of a large existing silver-maple and define the two terrace spaces adjacent to the house. Several destinations are to be found within the garden. An overlook provides views across the garden, while a sunken bamboo grove allows for a moment of solitude.