The mother of all Legal Sea Foods, Legal Harborside is the upscale seafood chain's flagship restaurant on the Boston Waterfront. The 20,000sqft space takes over three floors, each with a different concept. The first floor is a nod to the restaurant's heritage as a casual all-day seafood market, complete with picnic tables and an oyster bar (up to 14 varieties of oysters are offered daily). On the second floor, a more formal dining room serves a sophisticated menu (you won't find any lobster rolls up here). Finally, overlooking the harbor on the third floor is a massive roof deck with wines by the glass, sushi, and small bites.