Fodor's Expert Review Kaiserswerth
Düsseldorf
Free
A 25-minute ride on the U79 from the City Center puts you in this historic corner of Düsseldorf, reminiscent of a storybook German town with its winding cobblestone streets and neatly packed stone and brick buildings. Don't miss seeing the crumbling ruins of Kaiserpfalz, a 12th-century castle on the banks of the Rhine.