The capital of Afghanistan is Kabul, a city with a population of over 4 million people. It is located in the eastern part of the country and is the largest city in Afghanistan. Kabul has been an important cultural and economic center for centuries, and it is the political center of the nation. The city is home to many government buildings, embassies, and other important institutions. Kabul is also known for its vibrant nightlife, with many restaurants, bars, and clubs.