Sullivan's

Where Carson Beach and Fort Independence meet sits a summer shack that’s been a Southie icon for 60 years. There you’ll find plump, grilled Kayem franks topped with fixings and tucked into toasted-dry buns. Order a Sully’s trifecta—dog, crinkle-cut fries, and soft-serve—then stroll around Castle Island digesting the rest of it: harbor breezes, descending Logan-bound planes, and a return to old-fashioned summer nights.