west by the ocean, and east by the municipality of Oeiras. Administratively, the municipality is divided into 4 civil parishes (freguesias), with municipal authority vested in the Câmara Municipal of Cascais: Alcabideche Carcavelos e Parede Cascais e Estoril São Domingos de Rana Cascais' coastline is home to 17 beaches. These are: Guincho Beach and Carcavelos Beach are especially well known as good surf spots. Close to Praia do Guincho is the Cresmina Dune, which is an unstable dune system due to the constant drifting of sand particles caused by strong winds. Climate Cascais has a Mediterranean climate (Köppen: Csb) with mild, wet winters and warm, dry summers. Moderated by the Atlantic and the typical urban heat island of a city, temperatures in Cascais rarely get below or above . Economy Cascais is easily reached from Lisbon by car on the A5 Lisbon-Cascais highway, or alternatively on the scenic "marginal" road, as well as by frequent inexpensive commuter trains. Taxis are also a common and inexpensive mode of transport in the area. The city has the ruins of a castle, an art museum and an ocean museum, as well as parks and the cobbled streets of the historic centre. The town has many hotels and tourist apartments as well as many good restaurants of varying cost. It is a fine base to use for those visiting Lisbon and its environs who prefer to stay outside of the city yet in an equally urban and sophisticated environment. Cascais ranks 9th in population density and 6th in percentage of population employed among Portuguese municipalities. Cascais is surrounded by popular beaches. Guincho Beach to the northwest is primarily a surfing, windsurfing, and kitesurfing beach because of the prevailing winds and sea swells, while the calm waters of the beaches to the east attract sunbathers. The lush Sintra mountains to the north are a further attraction. The shoreline to the west has cliffs, attracting tourists who come for the panoramic views of the sea and other natural sights such as the Boca do Inferno. It is also becoming a popular golf destination, with over 10 golf courses nearby. A large marina with 650 berths was opened in 1999 and has since held many sailing events. It was the official host of the 2007 ISAF Sailing World Championships for dinghies and racing yachts. The municipality also hosts international tennis and motorcycling events and for many years