I use the one at the other end of the harbour - up the road where MacDonalds is, and when levelish with MacDonalds on your left, turn right. Pay the little man at the kiosk, proceed, park. If there is no man and no kiosk, and you are feeling suddenly much colder and having difficulty breathing, it isn't exactly a right turn at MacDonalds at all, and you have just driven into the sea.
The beauty of this one is you always get somewhere to park.