The main place of interest in this small garden is the glen, created in true picturesque style, with an artificial waterfall and a rustic cottage. Views of the cottage and waterfall have been carefully composed, and the sound of water creates a counterpoint to the visual delights of the garden. An installation by the American artist James Turrell, Air Mass, is open to visitors, although the time of day it was intended to be seen -- dusk -- unfortunately doesn't correspond with the garden's hours in summer (the sun's still shining when they close at 6pm).