Bielefeld is a city in North Rhine-Westphalia, Germany. Known for its cultural diversity and historical sites, Bielefeld offers attractions like the Sparrenburg Castle, the Old Town Hall, and the Kunsthalle Bielefeld art museum. The city is also recognized for its parks, including the Japanese Garden and the Botanical Garden. With a mix of traditional and modern elements, Bielefeld combines a rich history with contemporary urban life.