A megalopolis is a large urban area that typically consists of multiple interconnected cities and their suburbs, forming a continuous metropolitan region. This term is often used to describe regions with high population density and significant economic, cultural, and infrastructural integration. Examples include the Northeast Corridor in the United States, which stretches from Boston to Washington, D.C., and the Tokyo-Yokohama area in Japan. Megalopolises often face unique challenges, such as traffic congestion, environmental issues, and resource management.