Sullivan's Castle Island
Family owned and established in 1951, this beach-style dairy bar—affectionately nicknamed Sully's—serves fried seafood, hot dogs, hamburgers, and ice cream at Castle Island. Don't expect frills or indoor seating—there is no need since its surroundings provide sloping lawns, picnic tables, benches, and beach vistas for lunching. Fries don't automatically come as a side with sandwiches, so if you want them, make sure you order them.