Düsseldorf impresses with boundary-pushing architecture, zinging nightlife and an art scene to rival many higher-profile cities. It’s a posh and modern city that seems all buttoned-up business at first glance: banking, advertising, fashion and telecommunications are among the fields that have made North Rhine–Westphalia's capital one of Germany’s wealthiest cities. Yet all it takes is a few hours of bar-hopping around the Altstadt (the historical quarter along the Rhine) to realise that locals have no problem letting their hair down once they shed those Armani jackets.