Copenhagen is the capital and largest city of Denmark. It is located on the islands of Zealand (Sjælland) and Amager, at the southern end of the Øresund strait. With a population of over 650,000, it is the most populous city in the Nordic countries. Copenhagen is a global city and a major center for business, finance, culture, education, and research. It is also a popular tourist destination, known for its historical and cultural attractions, its vibrant nightlife, and its commitment to sustainability.