Berlin is thecapital city ofGermany and one of the 16states of Germany. With a population of 3.4 million people, Berlin is themost populous city proper, the sixthmost populous urban area in theEuropean Union, and thelargest German city.^[1]

Located in northeastern Germany on the RiverSpree, it is the center of theBerlin-Brandenburg Metropolitan Region, which has about 6 million residents from over 180 nations.^[2][3][4][5] Its elevation is about 32 m above sea level.^[6]

Due to its location in theEuropean Plain, Berlin is influenced by atemperate seasonal climate. Around one third of the city's area is composed of forests, parks, gardens, rivers and lakes.^[7] Berlin is surrounded by the state ofBrandenburg.

Berlin is located in northeasternGermany in an area of low-lying marshy woodlands with a mainly flat topography. It is part of the vastNorthern European Plain that stretches from northernFrance to westernRussia. The Berlin–WarsawUrstromtal (ice ageglacial valley), between the lowBarnim Plateau to the north and theTeltow Plateau to the south, was formed by meltwater flowing from ice sheets at the end of the lastWeichselian glaciation. TheSpree follows this valley now. In Spandau, Berlin's westernmost borough, the Spree empties into the riverHavel, which flows from north to south through western Berlin. The course of the Havel is more like a chain of lakes, the largest being the Tegeler See andGroßer (Grosser) Wannsee. A series of lakes also feeds into the upper Spree, which flows through theGroßer (Grosser) Müggelsee in eastern Berlin.^[8]

Substantial parts of present-day Berlin extend onto the low plateaus on both sides of the Spree Valley. Large parts of the boroughs,Reinickendorf andPankow lie on the Barnim Plateau, while most of the boroughs—Charlottenburg-Wilmersdorf,Steglitz-Zehlendorf,Tempelhof-Schöneberg, andNeukölln—lie on the Teltow Plateau.

The borough of Spandau lies partly within the Berlin Glacial Valley and partly on the Nauen Plain, which stretches to the west of Berlin. The highest elevations in Berlin are theTeufelsberg and theMüggelberge in the city's outskirts, and theKreuzberg is the highest elevation in the centre. While the latter measures 66 m (217 ft) above sea level, the former are both about 115 m (377 ft) above sea level. The Teufelsberg is actually an artificial hill composed of apile of rubble from the ruins ofWorld War II.^[9]

The current 12 Berlin boroughs, as listed below.^[10]

Borough	Population 31 March 2010	Area in km²	Density per km²	Map
Charlottenburg-Wilmersdorf	319,628	64.72	4,878
Friedrichshain-Kreuzberg	268,225	20.16	13,187
Lichtenberg	259,881	52.29	4,952
Marzahn-Hellersdorf	248,264	61.74	4,046
Mitte	332,919	39.47	8,272
Neukölln	310,283	44.93	6,804
Pankow	366,441	103.01	3,476
Reinickendorf	240,454	89.46	2,712
Spandau	223,962	91.91	2,441
Steglitz-Zehlendorf	293,989	102.50	2,818
Tempelhof-Schöneberg	335,060	53.09	6,256
Treptow-Köpenick	241,335	168.42	1,406

Berlin's climate is "Oceanic", according to theKöppen climate classification system.

Summers are warm and sometimes humid, with average high temperatures of 22–25 °C (72–77 °F) and lows of 12–14 °C (54–57 °F). Winters are relatively cold, with average high temperatures of 3 °C (37 °F) and lows of −2 to 0 °C (28 to 32 °F). Spring and autumn are generally chilly to mild. Berlin's built-up area creates a microclimate, with heat stored by the city's buildings. Temperatures can be 4 °C (7 °F) higher in the city than in the surrounding areas.^[11]

Annual precipitation is 570 millimeters (22 in), with moderate rainfall throughout the year. Light snowfall mainly occurs from December through to March, but snow cover does not usually remain for long. The recent winter of 2009/2010 was an exception, as there was a permanent snow cover from late December until early March.^[12]

Berlin's history has left the city with a highly eclectic array of architecture and buildings. The city's appearance today is predominantly shaped by its key position in Germany's history during the 20th century. Each of the national governments based in Berlin—the 1871 German Empire, the Weimar Republic, Nazi Germany, East Germany, and now the reunified Germany—initiated ambitious (re-) construction programs, with each adding its own distinctive style to the city's architecture.

Berlin was devastated by bombing raids during World War II, and many of the buildings that had remained after the war were demolished in the 1950s and 1960s, in both West and East Berlin. Much of this demolition was initiated by municipal architecture programs to build new residential or business quarters and main roads.

The eastern parts of Berlin have manyPlattenbauten, reminders ofEastern Bloc ambitions to create complete residential areas consisting of fixed ratios of shops, kindergartens, and schools to the number of residents.

Clusters oftowers rise at various locations:Potsdamer Platz, theCity West, andAlexanderplatz, the latter two delineating the former centers of East and West Berlin, with the first representing a new Berlin of the 21st century, risen from the wastes of no-man's land of the Berlin Wall. Berlin has three of the top 40tallest buildings in Germany.

Over one-third of the city area consists of green space, woodlands and water.^[17] Berlin's second largest and most popular park, theGroßer Tiergarten, is located right in the center of the city. It covers an area of 210 hectares and stretches fromBahnhof Zoo in the City West to theBrandenburg Gate in the east.

TheFernsehturm (TV tower) atAlexanderplatz inMitte is among the tallest structures in the European Union at 368 meters (1,207 ft). Built in 1969, it is visible throughout most of the central districts of Berlin. The city can be viewed from its 204 m (669 ft)-high observation floor. Starting here, theKarl-Marx-Allee heads east, an avenue lined by monumental residential buildings, designed in theSocialist Classicism style of theJoseph Stalin era. Adjacent to this area is theRotes Rathaus ("City Hall"), with its distinctive red-brick architecture. In front of the Rotes Rathaus is theNeptunbrunnen, a fountain featuring a mythological group ofTritons,personifications of the four main Prussian rivers, withNeptune situated on top of it.

TheEast Side Gallery is an open-air exhibition of art painted directly on the last existing portions of the Berlin Wall. It is the largest remaining evidence of the city's historical division and the inauguration of its restoration occurred in November 2009; the restoration project cost the Berlin city government more than €2 million.^[18]

Berlin'sBrandenburg Gate is an iconic landmark of Germany and appears on Germany's euro coins (10 cent, 20 cent, and 50 cent).^[19] TheReichstag building is the traditional seat of the German Parliament, renovated in the 1950s after severe damage sustained during World War II. The building was again remodeled by British architect,Sir Norman Foster, in 1999,^[20] and features a glass dome over the session area, which allows free public access to the parliamentary proceedings and magnificent views of the city.

TheGendarmenmarkt, aneoclassical square in Berlin whose name dates back to the quarters of the famous Gens d'armes regiment located here in the 18th century, is bordered by two similarly designed cathedrals, theFranzösischer Dom with its observation platform and theDeutscher Dom. The Konzerthaus (Concert Hall), home of the Berlin Symphony Orchestra, stands between the two cathedrals.

TheMuseum Island, in theRiver Spree, housesfive museums, built between 1830 and 1930, and is a UNESCO World Heritage site.^[21] Restoration and the construction of a main entrance to all museums, as well as the reconstruction of theStadtschloss on the same island^[22] is costing over 2 billionEuros since reunification.^[23] Also located on the island, and adjacent to theLustgarten and palace, isBerlin Cathedral, emperor William II's ambitious attempt to create a Protestant counterpart toSt. Peter's Basilica in Rome.^[24] A large crypt in the church houses the remains of some members of the earlier Prussian royal family and the church is now owned by the Protestant umbrella organization,Union of Evangelical Churches (UEK).^{[citation needed]} Like many other buildings, the Berlin Cathedral suffered extensive damage during World War II and was later restored. Berlin's best preserved medieval church, theChurch of St. Mary's, is the first preaching venue—Memorial Church being the second—of the Bishop of theEvangelical Church of Berlin-Brandenburg-Silesian Upper Lusatia (EKBO), a Protestantregional church body.^{[citation needed]}St. Hedwig's Cathedral is Berlin's most prominent Roman Catholic cathedral.^[25]

Unter den Linden is a tree-lined east–west avenue that extends from the Brandenburg Gate to the site of the former Berliner Stadtschloss, and was Berlin's premier promenade in the nineteenth century. Many classical buildings line the street and part ofHumboldt University is located there.^[26]Friedrichstraße was Berlin's legendary street during the "Roaring Twenties" and today, it combines twentieth-century traditions with the modern architecture of contemporary Berlin. Places of significance in the area include the Admiralspalast, the Friedrichstadt Palast, and the Theater am Schiffbauerdamm, home to the Berliner Ensemble.^[27]

Potsdamer Platz is a quarter that was built in its entirety after the Berlin Wall was deconstructed in 1995.^[28] To the west of Potsdamer Platz is the Kulturforum, which houses theGemäldegalerie, and is flanked by theNeue Nationalgalerie and theBerliner Philharmonie. TheMemorial to the Murdered Jews of Europe, aHolocaust memorial, is situated to the north.^[29]

TheHackescher Markt was constructed as a joint endeavour between the Berlin City Commandant, Graf von Hacke, and Friedrich II. In 1840 it was officially renamed as Hackescher Markt. The area around Hackescher Markt is home to fashionable culture, with countless clothing outlets, the offices of international fashion labels, clubs, bars, and galleries.^[30] TheHackesche Höfe is also a part of the area and is a conglomeration of buildings that were reconstructed around 1996; the buildings now surround several courtyards.^[31]Oranienburger Straße and the nearbyNew Synagogue were the center of Jewish culture before 1933. Although the New Synagogue is still an anchor for Jewish history and culture, Oranienburger straße and surrounding areas have become increasingly known for pubs, shopping, theaters, art galleries, and nightlife.^[32]

TheStraße des 17. Juni, connecting the Brandenburg Gate and Ernst-Reuter-Platz, serves as a central East-West axis. Situated in the western part of the city, its name commemorates theuprisings in East Berlin of June 17, 1953.^[33] Approximately half-way from the Brandenburg Gate is the Großer Stern, a circular traffic island on which theSiegessäule ("Victory Column") is situated. This monument, built to commemorate Prussia's victories, was relocated from its previous position in front of the Reichstag in 1938 by the Nazis.^[34]

TheKurfürstendamm is home to some of Berlin's luxury shops, restaurants, and cafes, with theKaiser Wilhelm Memorial Church at its eastern end onBreitscheidplatz (the church was destroyed in World War II and left in ruins, but was rebuilt between 1959 and 1963);^[35] theaters and concert halls, such as Philharmonie Berlin and Theater am Kurfürstendamm, are also located in the neighborhood.^[36] Nearby on Tauentzienstraße, isKaDeWe, continental Europe's largest department store.^[37] TheRathaus Schöneberg ("City Hall"), whereJohn F. Kennedy made his famous "Ich bin ein Berliner!" speech, is situated inTempelhof-Schöneberg.^[38]

West of the city center,Schloss Bellevue is the residence of the German President.^[39]Schloss Charlottenburg, which was severely damaged by fire during World War II, and largely destroyed, has been rebuilt and is the largest surviving historical palace in Berlin.^[40]

TheFunkturm Berlin is a 150 m (490 ft)-tall lattice radio tower, built between 1924 and 1926. The construction was designed by architect, Heinrich Straumer, and became operative at the 3rd IFA fair; several years after becoming operative, it was sending television images without sound. The tower hosts a restaurant 55 m (180 ft) and an observation deck 126 m (413 ft) above-ground, which is reachable by a glass elevator. On a clear day, the tower offers a comprehensive view of western Berlin.^[41]

Rank	Name	Image	Height (m)	Year built
1	Berliner Fernsehturm		368	1965–1969
2	Berliner Funkturm		146.8	1924-1926
3	Park Inn Berlin		125	1967-1969
4	Treptowers		125	1995-1998
5	Steglitzer Kreisel		119	1968-1980

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