There are six absolutely bitchin' casemates built into and around Fort Mifflin's main gate. Casemates were intended for use as bombproofs, in which a fort's garrison might huddle were it under artillery bombardment. All of these casemates were regularly reported to be rather leaky and unpleasant, especially in springtime, when they would frequently flood.

This would be Casemate No. 1, a guardhouse that featured two bake ovens, on the wall behind where I'm standing for this picture. Casemate No. 1 is 50 feet long, 18 feet wide and 12 feet high at the center of its arch. Fort Mifflin's signature flag, the Naval Jack, was all nicely collected along the center table. Perhaps that's what those useless Boy Scouts were really there for!