Dunedin City is set in the eroded core of an ancient volcano. The City Centre, situated at the south end of Otago Harbour, occupies the central part of an ancient volcanic system, a pile of lava flow some 25 km across which erupted between 10 to 13 million years ago. Dunedin's temperate climate and coastal setting amongst hills and valleys creates a range of micro-climates and environments suitable for plants from around the world. Where else can you visit collections of alpine plants and rock gardens, and within a few minutes just down the road, wander amongst rhododendrons in a woodland glade where choice plants such as Nomocharis, Trillium, Lapageria and Meconopsis flower and thrive?There is no rainy season to dampen the spirit of Dunedin. The city receives less than 800mm of rainfall each year. Instead we experience extended twilight in summer, rich autumnal tones full of texture, romantic winter nights nestled in front of open fires and the colour of springtime.