consists of motor boats of various sizes, water scooters and ferries handling traffic in the archipelago. In terms of natural geography, the coastal waters of Espoo are divided into four different sea areas, consisting counting from the west of Espoonlahti, Suvisaaristo-Lauttasaari and Seurasaari. The fourth sea area is Helsinki-Porkkala to the south of the other three. The surface area of the Espoonlahti sea area is 19.2 square kilometres. The Espoonlahti nature preserve area is located in its northern part. The western part of the sea area is located in the neighbouring municipality of Kirkkonummi. The surface area of the Suvisaaristo-Lauttasaari sea area is 48.5 square kilometres. It reaches from the shores of the islands of Stora Herrö and Pentala up to the West Harbour in Helsinki. The surface area of the Seurasaari sea area is 13.1 square kilometres. The Laajalahti nature preserve area is located in its northwestern part. Most of the sea area is located in neighbouring Helsinki. The surface area of the Helsinki-Porkkala sea area is 400.5 square kilometres. It reaches from the eastern shore of the Porkkalanniemi peninsula up to Suomenlinna and Santahamina. Islands in the sea area include Kytö, Stenskär, Knapperskär and Gåsgrund. Shoreline The shoreline of Espoo is about 58 kilometres long and there are 165 islands in front of it. The shoreline is diverse and contains decomposing bays, reed beds, sandy beaches, coastal cliffs and boat harbours. The district of Westend contains private house lots reaching to the sea shore, while the sea shore in the rest of Espoo is mainly in public use. The Rantaraitti hiking route spans almost the entire sea shore of Espoo. The district of Kivenlahti contains coastal cliffs, man-made shoreline and sandy beaches. The land in Espoo is rising by about a quarter of a metre per century and the moist land rise shores are slowly becoming bogs. Continental area There are six Natura 2000 areas in Espoo: the Bånberget forest area, Espoonlahti-Saunalahti (partly located in Kirkkonummi), the Laajalahti bird waters, Matalajärvi, Nuuksio (partly located in Kirkkonummi and Vihti) and the bogs, groves and old forests in Vestra (partly located in Vantaa). The forests in Espoo are mainly pine barrens consisting mostly of spruces and pines, with some deciduous trees. There are lush and diverse groves in some places, containing many hardwood trees such as oak. The ecological core area of southern Espoo is the Espoo Central Park, consisting