Even the most effortless-looking landscape can have a problematic backstory. Behind what looks like the unfettered beauty of nature may lie endless tales of drainage issues, massive trees, and stubborn boulders that hindered progress and planting. In a long career, landscape architect Gregory Lombardi, has experienced just about every problem one can imagine. Still, the gorgeous grounds of this hillside home on the North Shore of Massachusetts might well rank among his toughest challenges.