Tempelhofer Feld and the Berlin that surprises you

This is Berlin in a nutshell: a vast former airport turned into the city's most beloved public park, where the old runways are now used by cyclists, skaters, kite-flyers and picnicking locals. It's completely free, gloriously strange, and pure Berlin. Pair it with a Sunday afternoon at the open-air karaoke in Mauerpark, another free institution, and you've seen a side of the city most first-timers miss. We'll point you to the best of these quirky, no-cost Berlin experiences.