 The two parts of the Dunedin Botanic Garden are known simply as the upper gardens and the lower gardens.The lower gardens are at an altitude of some 25 metres; the upper gardens rise up the hill-spur to a height of 85 metres.The lower gardens' features include the Winter Garden, a heated Edwardian glass house, rose and herb gardens, a duck pond, children's playground, sound shell, and Japanese garden, the latter commemorating links with Dunedin's Japanese sister city, Otaru.