Cologne is compact enough to see well in a day if you pick the right stops. The Cologne Cathedral dominates the skyline and the historic center, its twin spires visible from almost anywhere in the city, making it the natural starting point. From there the Hohenzollern Bridge offers striking views back toward the cathedral and its thousands of love-locks draw visitors year-round. Wander into the Old Town for narrow lanes, riverside beer halls, and a genuine sense of pre-war Cologne, then round out the visit with the Wallraf-Richartz Museum or Museum Ludwig for old masters and modern art within easy walking distance of each other.