Baku
Baku (; , from the medieval  Bâd-kube, meaning "wind-pounded city", a compound word of bād, "wind", and kube, which is rooted in the verb کوبیدن kubidan, "to pound", thus meaning a place where the wind would be strong and pounding, and ancient city names  Baraca/) is the capital) is the capital and the largest city of Azerbaijan, as well as the largest city on the Caspian Sea and of the Caucasus region. It is on the southern shore of the Absheron Peninsula. Baku is located  below sea level, which makes it the lowest lying national capital in the world and also the largest city in the world located below sea level. Modern Baku has three parts: the Old Town (İçəri Şəhər), the boomtown and the Soviet-built town. About 3 million people live in the metropolitan area.  There are large numbers of refugees and internally displaced persons.