10 Most populated cities in the world (+Photos)

2) Karachi

The biggest city of Pakistan, also known as ‘City of Lights’ for its bright night life, is the second most populous city in the world. It is a home to all the business activities in the country, be it, banking, trading or economy.

The enormous population of 23.5 million (23,500,000) is also due to the fact that Karachi is the main business center of, almost, all the corporations in Pakistan. Having population density of 6,663/km2, it is also a main hub of higher education in Muslim world.