 Many famous castles, palaces, residences and state-run convents where built by the Habsburger along the river.Nowadays they still remind us of the bold architecture of the "Donaubarock".Today, people can not only travel by boat on the Danube, but also by train, by bike on the Danube Bike Trail or walk on the "Donausteig" and visit the UNESCO World Heritage cities of Regensburg, Wachau and Vienna.