See all shopping in Helsinki Helsinki for: Adventure, Food And Dining, Art And Culture, Nightlife, Spa, History, First Timers, Family, Romance, Shopping Hietalahti Open Air Flea market About Hietalahti Open Air Flea market. Next to Hietalahti Antique and Art Hall, this is the most popular flea market in Helsinki. Open year round, but busiest from May to August. Add to Wish List
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