The main urban area occupies a narrow isthmus between the Manukau Harbour on the south-west and the Waitemata Harbour on the north-east.
The harbours are on the Tasman Sea and on the Pacific Ocean. It is therefore one of the few cities in the world to have harbours on two separate major bodies of water.
(Actually, I can't think of another city with this feature - there are no cities that stretch across the central american isthmus; no cities are situated on the various capes (where oceans meet); the Baltic Sea/North Sea area would seem promising, but I have failed to find anything. Also within the Mediterranean you would think there must be something - but I cannot think of anything definite. Perhaps Gibaltar fits, if it has a harbour on both the Altantic side and the Mediterranean side).
