A cay in a distance from the beach when people duel, pistols, rapiers, katanas, what have you. It's a silent consensus with the authorities that people don't make a fuss of their disagreements and resolve it there. The rocky shores that surround the sand covered area in the centre would appear to be a naturally formed ring for precisely this purpose, as though the divine forces wished to give people a place to resolve their differences on this island. If you look over the side you can catch a glimpse of objects of people that died there. However, the the crashing waves that hit the uneven, dangerous formations of a coral reef about 10 feet down make retrieving anything very dangerous.