 The pond is surrounded by several landscaped hills, resulting in a somewhat manicured park landscape, planned in deferential reference to the estate plantings of the owners of the mansions that once lined this stretch of Fifth Avenue.Conservatory Water is named for another estate-garden feature, a glass-house for tropical plants, to be entered from Fifth Avenue by a grand stair.The garden had been proposed in the Greensward Plan of 1857, during a design competition for Central Park where the Greensward Plan ultimately won out.