the garden's primary feature is a large pond with islands and walkways, whose north and south segments were linked by a short canal in 1747. the north pond was extended and reworked from 1684-1688; the south pond is notable for its expansive "ocean shore" of rounded stones and cherry trees, an edging of mixed natural and hewn stones, and a separate, understated embankment of squared stones. the ponds contain a variety of highly picturesque islands and six bridges in a varied styles, including one with an impressive wisteria trellis (built 1895).