1. Bielefeld is home to the famous "Bielefeld Conspiracy," an internet meme suggesting that the city doesn't actually exist and is a fabrication of the government, sparking curiosity and humor among residents and visitors alike. 2. The city boasts a rich history dating back to the 13th century, including the iconic Sparrenburg Castle, which offers stunning panoramic views of the surrounding area and serves as a popular tourist destination. 3. Bielefeld has a vibrant cultural scene, featuring a variety of annual festivals, including the Bielefeld Festival, which showcases local artists, musicians, and performers, celebrating the city's diverse cultural heritage.