Tehran is the capital and largest city of Iran, and the administrative center of Tehran Province. Tehran is a sprawling city at the foot of the Alborz mountain range (the highest point in the Middle East (1,191 m, 3,900 ft)) with an immense network of highways unparalleled in Western Asia. Tehran is famous for its numerous ski resorts on the Alborz slopes, large museums, art centers, and palace complexes. Tehran is the largest city in the Middle East and is the most populated city in South Western Asia with a population of 7,404,515 and approximately 15 million in Greater Tehran. Most Iranian industries are headquartered in Tehran. The industries include the manufacturing of automobiles, electrical equipment, military weaponry, textiles, sugar, cement, and chemical products. It is also a leading center for the sale of carpets and furniture. There is also an oil refinery located in south of the city. Tehran is a relatively old city; as such, it has an architectural tradition unique to itself. Archaeological investigations and excavations in Tehran demonstrate that this area was home to civilizations as far back as 6,000 years BC. Tehran, as Iran's showcase and historical capital city, has a wealth of cultural attractions. The Peacock Throne of the Persian Kings (Shahs) can be found in Tehran's Golestan Palace. Some of the well-known museums are National Museum of Iran, Sa'dabad Palaces Complex, Glassware and Ceramics Museum of Iran, The Carpet Museum of Iran, Tehran's Underglass painting Museum, and Niavaran Palace Complex. The Tehran Museum of Contemporary Art features the works of great artists such as Van Gogh, Pablo Picasso and Andy Warhol.