Modern cities are large urban areas characterized by advanced infrastructure, diverse populations, and a variety of services. They often feature skyscrapers, public transportation systems, and green spaces, making them hubs of economic activity and cultural exchange. Examples of modern cities include New York, Tokyo, and London. These cities are designed to accommodate millions of residents and visitors, offering amenities such as shopping centers, parks, and entertainment venues. Modern cities also focus on sustainability, incorporating eco-friendly practices and technologies to reduce their environmental impact. Urban planning plays a crucial role in shaping the growth and functionality of these metropolitan areas.