British soldiers were brought in to stop Bermudian "treachery." The United States and France plotted to capture Bermuda but never followed through. The gunpowder was used by the Americans at the Battle of Bunker Hill". - http://www.bermuda-online.org/forts.htm
The fort was turned into a restaurant in the 1960's, Gun Powder Tavern.
Segments of the fort and hints of the restaurant social aspect are an interesting combination when crossed with the limestone stalagmites/stalactites which provides an eerie sense of life to the deserted rooms.
A mix of daylight, long exposures - light painting with torches and off-camera flash creates some very unusual imagery within these historical walls.