Karachi is the capital of the Pakistani province of Sindh. It is the most populous city in Pakistan and the third most populous city in the world. Ranked as a beta world city, the city is Pakistan’s premier industrial and financial center. Known as the “City of Lights” for its vibrant nightlife, Karachi is also Pakistan’s most cosmopolitan city. Situated on the Arabian Sea, Karachi serves as a transport hub and is home to two of Pakistan’s two largest seaports, the Port of Karachi and Port Bin Qasim, as well as the busiest airport in Pakistan.