We of course are accustomed to seeing long rows of casemates diminishing off into the distance, but what's pretty rare amongst American starforts is this curve we get along Fort Pike's eastern side, which side faces the direction from which trouble was expected to approach: The Rigolets. In theory, this was to give the twelve guns covering the waterway the widest angles possible, and it was definitely Simon Bernard's idea.

Fort Macomb of course shares this design, but the only other American starforts with such a curvature that spring to mind are Fort Popham in Maine; Fort James Jackson in Savannah, Georgia; and the redoubtable Fort Massachusetts off of Gulfport, Mississippi.