General . Espoo has an area of — (59%) of land and (41%) of water. Sea water makes up 37% of the total area of Espoo and inland water makes up a bit over 3%. The largest lakes in Uusimaa,
Lohjanjärvi and
Hiidenvesi, are located west of the ridge. The highest point in Espoo is Velskola at above sea level, and the lowest point is at sea level. Espoo is a part of the
Helsinki capital region and is contiguously bordered by the cities, towns and municipalities of
Kirkkonummi,
Vihti,
Nurmijärvi,
Vantaa,
Kauniainen and
Helsinki. For a city of its size, Espoo is home to exceptionally large natural areas. The southern part of the city is characterized by maritime environment, including a varied coastline and an archipelago consisting of 165 islands.
Bedrock The minerals and structures of the rocky and hilly topography of Espoo were formed about 1880 to 1650 million years ago. Particularly the
Weichselian glaciation has had an effect on the current environment – the continental ice sheet withdrew from what is now Espoo about 13 thousand years ago. The first areas to surface from underneath the sea were the high hills in northern Espoo, such as Mustankorvenkallio. The numerous smooth cliffs on the seashore and in the archipelago were caused by wear by the continental ice sheet; there are grooves on their surfaces, indicating the direction of the flow of the ice sheet. Icebergs split off from the ice sheet have transported
glacial erratics, including those in Kunnarla, Soukka and Suomenoja. Main rock types in the Espoo bedrock include
gneiss,
migmatite,
granite,
gabbro,
amphibolite and
mica schist. Rare
orbicular granite can be found in Nuuksio, the deposit is internationally valuable. The depth of the southern part of the sea area, in the outer archipelago, is a few dozen metres at the most. The ship route between Helsinki and
Stockholm,
Sweden goes through the outermost parts of the sea area which contains small treeless, sea-washed
islets. One of them is the former fortification island of
Kytö. The smallest islands are shallow islets, such as Stenskär. They are significant nesting grounds for birds and many of them are nature-protected areas. In summertime there might be flowering meadow patches on the islands. The islands closest to the Espoo shoreline include Stora Herrö, Pentala, Kopplorna and Lehtisaaret. The islands host many vacation buildings, and they are often referred to as an intermediary archipelago. The maritime traffic in front of Espoo mainly 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 . 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 . 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 . 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 . 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 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. 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 mainly of two forest massives: Harmaakallo and Bosmalm. The most famous and most popular nature area in Espoo is the
Nuuksio National Park located on the lake highland of northern Espoo, reaching over to Kirkkonummi and Vihti. As well as the contiguous forest and pools of sweet water, Nuuksio contains small bogs and meadows. There are also lush grove-like brook valleys in the area. The highest spot in Espoo, Mustankorvenkallio, is located in Velskola to the southwest of Saarijärvi above sea level and over above the water level of Saarijärvi. There are also considerably high spots very near the coast, such as the Kasavuori hill in Soukka, rising to above sea level.
Inland waters There are over a hundred lakes and ponds in Espoo, of which 73 have an area of over a hectare. The lakes in Espoo were formed when the land slowly started rising after the continental ice sheet had thawed, and water started flowing into the crevices in the bedrock. The oldest lakes in Espoo are Kalatoin, Iso Majaslampi, Orajärvi and Pieni Majaslampi, all located over above sea level. At that time, what is now the Baltic Sea was in a so-called
Yoldia Sea phase, which had formed when the surface of the
Baltic Ice Lake had lowered tens of metres in a short time. Nuuksio slowly expanded into part of the mainland and new lakes were formed when the sea level sank. Development stopped for about a millennium and a half when the ancient Baltic Sea changed into the
Ancylus Lake. Its surface was originally about above the current sea level. The Ancylus Lake formed into the salty
Littorina Sea when the current
Danish straits started opening up. The surface of the Littorina Sea was about above the current sea level. At that time, almost all lakes in northern Espoo had been separated from the sea. Only the lake Nuuksion Pitkäjärvi remained as a narrow,
fjord-like bay. The shore of the Littorina Sea remained at its place for a long time as upthrust slowed down. Rocky rims remain of the ancient sea shore on hills and cliffs. Nuuksion Pitkäjärvi only separated from the sea and became an inland lake about five millennia ago. About four millennia ago the land had risen so far that also
Lake Bodom,
Lippajärvi and other pools in central Espoo changed from shallow bays into lakes. The largest depth of Nuuksion Pitkäjärvi is and the average depth is , and there are tens of lakes and ponds in its
drainage basin of .
Features Although Espoo is relatively highly populated, it has large amounts of the countryside and natural wilderness, particularly in the city's western and northern portions. The city has a total of 71 lakes, the largest of which are
Lake Bodom, Nuuksion Pitkäjärvi, Vanhankylän Pitkäjärvi, Loojärvi, Velskolan Pitkäjärvi, Saarijärvi, Matalajärvi, Siikajärvi, and Lippajärvi. The city has a large coastline on the
Gulf of Finland. Espoo has six
Natura 2000 protected areas: Bånberget forests, Espoonlahti–Saunalahti bay area (partially in
Kirkkonummi), Laajalahti bay, Matalajärvi lake,
Nuuksio National Park (partially in Kirkkonummi and
Vihti), as well as forests in Vestra (partially in
Vantaa). The official animal of Espoo is the
Siberian flying squirrel, the official bird is the
common blackbird, and the official plant is
Anemone nemorosa.
Flora and fauna s in
Matinkylä The city's Central Park's fauna represents a typical range of Finnish forest species. The most common flora in the Central Park includes
Equisetum,
ferns,
Anemone,
Lythrum and
Orchidaceae. Common mammal species present in Espoo include the
European hare and the
mountain hare, the
raccoon dog, the
red squirrel, the
elk, the
red fox, various bat species, the
European badger, as well as the
roe deer and the
white-tailed deer, The Suomenoja Bird Reserve in Finnoo, southern Espoo, is considered to be nationally significant for its bird diversity. Among others, there are endangered
moorhens, as well as
horned grebes and
gadwalls. The most common and audible maritime bird species is the
black-headed gull, but the
whooper swan is also a common sight in the city's archipelago, where
white-tailed eagles can be found as well. including the
Siberian flying squirrel, whose Finnish populations have experienced a steep decline for many decades due to logging. The flying squirrel is considered to be the official animal of Espoo, and the squirrel populations are especially plentiful in the northernmost parts of the city. However, the flying squirrel is also present in some southern areas, including the Central Park,
Soukka,
Espoon keskus,
Tapiola,
Laajalahti, Hannusmetsä and
Matinkylä. == Climate ==