For an unparalleled nature adventure, head for the Island of Many Hills. This place lives up to its name with 573 prominences of one kind or another. But the topography is in some ways the least of the adventure. With fifty-five different ecological communities packed into just twenty-odd square miles, the island is a veritable Garden of Eden. From marine eelgrass meadow to shrub swamp, low salt marsh to brackish intertidal mudflats, blueberry bog thicket to oak-tulip forest, this spot is a living...