Westfield World Trade Center has roughly 365,000 square feet (33,900 m2) of retail space, which once again makes it the largest shopping mall in Manhattan. Although the new mall is only spread over roughly one-half of the original mall's footprint (due to the new space required for the below-grade National September 11 Memorial & Museum), the mall is double-level, whereas the original mall was a single level. Three additional levels will exist above-grade on the lower floors of 2 and 3 World Trade Center, while 4 World Trade Center currently houses four above-grade levels. The …
The Oculus is the main station hub for the World Trade Center, and is therefore open 24 hours. The retail stores within The Oculus have various opening hours.