This map breaks the country into much smaller parts than we saw in the maps of Australia and Canada, New Zealand being a smaller country to start with. So while the states of Australia typically have the city with high prices and the rest of the state with lower prices, this map lets us see that Auckland (the only big city) is higher than anywhere else.

I also note two regions with the same number. When a value often has a round number, the median has a good chance of landing on it.