Linz is Austria’s third-largest city and an important river port where culture plays a significant role in everyday life. See the 13th-century Hauptplatz, Austria’s largest medieval square, and the Trinity Column, built in 1723 as thanks for the city escaping the ravages of the plague, war, and fire. Perhaps wander around the old castle grounds and take in the beautiful views of the river, or visit the neo-gothic New Cathedral, Austria’s largest church, with capacity for 20,000 visitors.