The town is a popular destination for both local and international tourists due to the year-round warm climate. Recently, the town has also become a preferred destination among golfers, as the town boasts several world class golf courses including Pezula Golf Course, Simola Golf Course and the well established Knysna Golf Course situated on the lagoon. It is situated near the towns of Plettenberg Bay and George, where there are airports. Knysna hosts a variety of events annually, which draw local and international visitors alike. Such events include the Pick n Pay Knysna Oyster Festival in late June and/or early July; the Pink Loerie Mardi Gras at the end of April and/or beginning of May and the Gastronomica lifestyle festival in September, which promotes healthy eating and organic principle. The town is primarily built on the northern shore of a large warm-water estuary, known as the Knysna Lagoon, which is fed by the Knysna River. The estuary opens to the ocean after passing between two large headlands. These are popularly known as "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."