After lunch you visit the remarkable Melk Abbey. Nothing quite prepares you for your first sight of this enormous honey-coloured building, standing resplendent above the surrounding countryside. Originally a castle, it was gifted to the Benedictine Order in the 11th-century and, although reconstructed in Baroque style during the 18th century, it has remained a monastic school and monastery ever since. The Abbey is renowned for its 214-yard-long Emperor’s Gallery lined with portraits, many fine rooms and an ornate library. After the tour, explore the grounds or take a stroll back to the ship through the picturesque old town, with buildings dating back to the 15th century. After we re-join the ship, dinner is served during the final part of our cruise upstream through the pretty Nibelungengau, immortalised in the music of Wagner.