b » chttp://www.houzz.com/r/1/10444005/MDNjNTYy/n283/v1/nllagl/u/KkoLSMZqJKFINPr4LfFstg> EFTA_R1_00064485 EFTA01760251 When a lilac tree died in Sloan Schang's yard in Portland, Oregon, last summer, it left behind a blank corner. It also provided him with an opportunity. A secluded backyard spa appealed to