As the coolest kid on the Scandi block, Copenhagen has it all: good looks, smarts and influence that far exceeds its size. Where else can you dive straight into a once-polluted inner-city harbour, ski down an eco-friendly power plant or cycle across a ‘Circle Bridge’ designed by art-world superstar Olafur Eliasson? While not short on cobbled streets and fairy-tale palaces, Denmark’s capital is a metropolis of the future – a clean, green marvel of electric-powered ferries and cutting-edge architecture as striking as it is sustainable.