In one of Manhattan’s few green and open spaces lies the world-famous Union Square Market. Established 36 years ago, the farmer’s market runs four times a week and is a must for local shoppers and foodies. Open on Monday, Wednesday, Friday and Saturday, there’s ample time for a visit in even the briefest of schedules. It’s also open all day, but jet-lagged Europeans can head there early to see the stallholders setting up - it’s the perfect way to start your day. It’s also just one of dozens of markets run in the city by the non-profit New York Greenmarket initiative.