 The geography of Southampton is influenced by the sea and rivers. The city lies at the northern tip of the Southampton Water, a deep water estuary, which is a ria formed at the end of the last Ice Age. Here, the rivers Test and Itchen converge. The Test — which has salt marsh that makes it ideal for salmon fishing — runs along the western edge of the city, while the Itchen splits Southampton in two — east and west. The city centre is located between the two rivers.
