As the primary and most populated city in Azerbaijan, Baku stands as the biggest city both on the Caspian Sea and in the Caucasus region. Situated 28 metres (92 ft) beneath sea level, Baku boasts the title of the world’s lowest national capital and grandest city situated below sea level. Nestled on the southern coast of the Absheron Peninsula, it settles along the Bay of Baku. Baku’s urban population at the start of 2009 was projected slightly above two million individuals. According to official data, around 25% of Azerbaijan’s total populace resides in the metropolitan sphere of Baku. Baku is the only metropolis in Azerbaijan.