outdoor patio, pergola, hot tub, and grilling area. i have a very good friend, susan cohan, who also happens to be an extraordinarily talented landscape designer her firm, susan cohan gardens, . 254 (2). the parks curvilinear design . get inspired by both the formal gardens of nemours mansion and the natural, native landscape of mt cuba center the nemours mansion and gardens is a . association of professional landscape designers (wwwapldnyorg) here in new york, and served as chair for the residential design professional practice . landscape design tips.