It may have started as a hot dog stand in Madison Square Park, but the Shack's now a national purveyor of seriously delicious burgers, shakes, custard, and hot dogs that everyone's come to love. Located across the street from the Museum of Natural History, the Upper West Side outpost (the second Shake Shack to <em>ever</em> open) has an enclosed sidewalk cafe and a downstairs rec room with a big screen TV. There are two lines, a C-line reserved for cold orders (that would be the frozen custard and concretes -- get them, they're good) and a regular one for everything else, which includes the signature ShackBurgers, crinkle-cut fries, and flat-top hot dogs.

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