Which retail store holds the Guinness World Record for the largest department store by gross square feet?

Think you know about extraordinary retail achievements? The retail industry has set some impressive world records over the years - from the largest stores and longest-running campaigns to the most innovative customer experiences. Test your knowledge about these remarkable retail milestones that have made it into the record books. This question focuses on a famous retail location that broke barriers and set standards in the industry.

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Macy's Herald Square (New York City, USA)
Shinsegae Centum City Department Store (Busan, South Korea)
Harrods (London, UK)
Galeries Lafayette (Paris, France)