A metropolis is a large and densely populated urban area that serves as a significant economic, political, and cultural center. These cities often have diverse populations and offer a wide range of services, industries, and amenities. Examples of metropolises include New York City, Tokyo, and London, each known for their unique characteristics and global influence. Metropolises typically feature advanced infrastructure, including transportation systems, healthcare facilities, and educational institutions. They are often hubs for innovation and creativity, attracting people from various backgrounds. The concentration of resources and opportunities in metropolises can lead to both growth and challenges, such as overcrowding and environmental concerns.