A combination of a super-mall, luxury showcase, restaurant hub, and industrial office space, Chelsea Market and its bustling interior always feel a bit like the holidays. There you’ll find businesspeople sipping Intelligentsia coffee next to tourists peeling apart lobsters next to focused shoppers looking to score their next great purchase. Fountains bathed in neon light flow next to cheery bakeries and gelato shops,  hip jewelry stores glitter, and unmarked doors promise the unknown.

Located next to the High Line in the center of Chelsea, the Market has many of its own stories to tell. It has an illustrious history and as many secret passageways and unsolved mysteries as you’d expect. Read on to discover the Top 10 secrets of the Chelsea Market.

10. The Oreo Cookie was Invented at Chelsea Market when it was the Nabisco Factory

Before Chelsea Market was Chelsea Market, it was the headquarters of the National Biscuit Company, also known as the Nabisco Factory. The factory officially opened in 1890 when eight bakeries came together to create one super-bakery, and continued to expand until 1958 when the corporation left the city for the suburbs.

Nabisco made everything from saltines to Fig Newtons to Mallomars to Animal Crackers. But in 1912, Nabisco invented arguably its most successful product— the Oreo cookie. Their lead food scientist Sam Porcello designed the recipe, and this as well as its design have remained essentially the same since then. The company also produced classic American products like Saltines, Vanilla Wafers, Fig Newtons, and Barnum’s Animal Crackers.