Belarus, a landlocked country in Eastern Europe, is known for its Stalinist architecture, grand fortifications and primeval forests. The region that is now Belarus was first settled by Baltic tribes in the 3rd century. Around the 5th century, the area was taken over by Slavic tribes. In the modern capital, Minsk, the monumental KGB Headquarters loom over Independence Square, while the Museum of the Great Patriotic War commemorates the country’s role in WWII. The capital is also home to many churches, including the neo-Romanesque Church of Saints Simon and Helena. Over 40% of its 207,600 square kilometres (80,200 sq mi) is forested. The climate features mild to cold winters, with average January minimum temperatures ranges from −4 °C (24.8 °F) in southwest (Brest) to −8 °C (17.6 °F) in northeast (Vitebsk), and cool and moist summers with an average temperature of 18 °C (64.4 °F). Many streams and 11,000 lakes are found in Belarus. Three major rivers run through the country: the Neman, the Pripyat, and the Dnieper. The Neman flows westward towards the Baltic sea and the Pripyat flows eastward to the Dnieper; the Dnieper flows southward towards the Black Sea. Belarus has four UNESCO-designated World Heritage Sites: the Mir Castle Complex, the Nesvizh Castle, the Belovezhskaya Pushcha (shared with Poland), and the Struve Geodetic Arc (shared with nine other countries).