I think there is about 7 or 8 unis in the whole of New Zealand.  The amazing homes on acreages around Queenstown (fly into Christchurch) are unique and are surrounded by no neighbours.  Unless they bury into the mountains to build their boltholds, the whole of NZ is on a major fault and they have had some serious earthquakes over the years, including one in Christchurch that killed 180 people in 2011.