Knysna (pronounced NIZE-nuh or NACE-nah, probably from a Khoikhoi word meaning "ferns") is a town in the Western Cape Province of South Africa and is part of the Garden Route. It lies 34 degrees south of the equator, and is 72 kilometres east from the town of George on the N2 highway, and 25 kilometres west of Plettenberg Bay on the same road. The town is primarily built on the northern shore of a large warm-water estuary, fed by the Knysna River. The estuary opens to the ocean after passing between two large headlands. These are popularly known as the "The Heads", and have become infamous due to the loss of boats and fishermen passing through their treacherous and unpredictable waters. Near them are geological formations, known locally as "The Map Stones." To the north of Knysna, Afro-Montane or temperate rainforest covers the hilly terrain for 20 km until changing to fynbos or macchia high up in the Outeniqua Mountains.