The city known for its extensive park system in the USA is Chicago. The city's renowned park network includes the famous Grant Park, which hosts a variety of festivals, concerts, and cultural events. Chicago's parks offer numerous recreational opportunities, with features like walking and biking paths, sports fields, and playgrounds. The city invested heavily in its parks, particularly during the 20th century, to enhance urban livability. This commitment to green spaces supports both the environment and the community, making Chicago a vibrant urban center.