ART GARDEN Los Altos Hills, California The colored walls edging the swimming pool and sheltering the entry courtyard are an integral part of the development of this hillside residence. Specimen waterwashed limestone boulders and cantilever decks merge over the entry koi pond. Ron Herman, Landscape Architect Robin Cowley, Artist Fox Landscape & Irrigation Click on images. Potomac Waterworks, 2451 Potomac Street, Oakland, California 94602-3032 Tel 510-482-1007   Fax 510-482-9465   Email paul@potomacwaterworks.com Website design by HYPERSPHERE. ©2004 Potomac Waterworks. All rights reserved.