Sullivan's Castle Island waterfront views and food

Sullivan's, the waterfront concession at Castle Island on William J. Day Boulevard, is known for its harbor views and casual seafood and hot-dog fare. The combination of picnic-style seating, views of Fort Independence and the Boston Harbor, and sunset scenes make it a frequent subject of visitor photos and short videos. Images and clips from Castle Island and Sullivan's commonly appear in social-media posts about Boston's seaside recreation.