the mothership of all burger joints. shake shack in madison square park. the only spot (currently being refurbished) that is worth the wait when you can have a bite outside. other than that, the taste's worn a bit off over the years. avoid the fries: they are never good, but either too overcooked or too undercooked. the custard ice cream is nice, though.
Shake Shack's new book drops a major hint about a possible new menu item - Business Insider