Saint John's is the capital and largest city of Antigua and Barbuda, serving as the nation's main port, commercial hub, and administrative center. Located on the northwest coast of Antigua around a sheltered natural harbour, it features colorful colonial architecture, a prominent Anglican cathedral, vibrant markets, and serves as a gateway to the country's renowned beaches and cruise tourism. It functions as the primate city, concentrating much of the island nation's activity and cultural life.