The Ruhrgebiet, also known as the Ruhr area, is a densely populated region in western Germany. It is known for its industrial history, particularly in coal mining and steel production. The area has transformed over the years, shifting from heavy industry to a more diverse economy that includes services and technology. The Ruhrgebiet is home to several major cities, including Dortmund, Essen, and Bochum. It features a rich cultural scene, with numerous museums, theaters, and music venues. The region is also recognized for its efforts in environmental sustainability and urban development, making it an interesting example of post-industrial change.