Passau is a very popular tourist attraction that puts a spell on national and international visitors alike. All sights are easy to reach by foot and one of the city’s most striking characteristics is its unique mixture of the old and the new. Consequently, it is not surprising at all that a visit to Passau may seem like a quick run through a variety of cultural epochs. Visitors can experience the ancient Roman culture firsthand in Kastell Biotro, which used to be part of the Limes and helped to guard the borders of the Roman Empire. One of the biggest preserved castle complexes in Europe, the Oberhausmuseum takes its visitors on an enjoyable tour to the everyday life in the Middle Ages.