With a growing reputation as one of of the coolest cities in the world, Germany’s second-biggest city and largest port makes for a bubbling melting pot of internationals. The sea-facing buildings make atmospheric spots for some of the country’s best restaurants, while parts of the Reeperbahn red-light district rival those found in Amsterdam. Hamburg is famed for its classical music, and locals are proud of their concert hall, the Elbphilharmonie. But music festivals all year round, and the pulsing nightlife prove the scene today is more dynamic. Want to see for yourself? Look for the nightclub that used to be a WWII bunker.