The Dunedin Botanic Garden (often incorrectly referred to as the Botanic or Botanical Gardens) is located at the northern end of central Dunedin, in the South Island of New Zealand. The garden is close to the University of Otago and one of the city's most historic cemeteries, the Northern Cemetery, on a spur of Signal Hill and on the river plain immediately below it. These two parts of the gardens 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 location of the gardens makes them popular with University students, as they lie between the University and the mouth of North East Valley, which houses a substantial proportion of the city's tertiary students. They are also easily accessible by road from the city centre, being located close to the northern end of the city's main business street, George Street, and at the northern end of the city's one-way street system, part of State Highway 1. A small suburban shopping centre lies close to the Garden's northern entrance at an intersection known as The Gardens Corner.
The Garden - New Zealand's oldest - was established in 1863 on a site surrounding the Water of Leith now occupied by the University of Otago. After extensive flooding in 1868, the gardens were moved to their current site in 1869. The name of the former site is still recorded in corrupted form in the now little-used name of Tanna or Tani (i.e., Botanic) Hill for the small but steep rise located close to the university's registry building).
The garden was extensively enlarged during the early years of the 20th century under the stewardship of David Tannock. The garden forms part of Dunedin's Town Belt, a green belt surrounding the inner city, and covers a total of 28 hectares (69 acres).