Baku is the capital of Azerbaijan, a country located in the Caucasus region of Eurasia. It is bordered by Russia to the north, Georgia to the northwest, Armenia to the west, and Iran to the south. Baku is the largest city in the Caucasus region and has a population of over two million people. The city is known for its rich cultural heritage, which includes ancient mosques, palaces, and fortresses. It is also home to many modern attractions, such as the Flame Towers, the Heydar Aliyev Center, and the Baku Boulevard.