Aggstein Ruins
At this former fortress of robber knights, wooden walkways take visitors to stairs, courtyards and towers. Tours take visitors back in time to the knights' everyday routines and medieval life. www.ruineaggstein.at
Melk Abbey
Right along the Danube, there is a fascinating Baroque complex visible from far and wide: Melk Abbey, one of the most impressive Baroque structures in Austria. www.stiftmelk.at