Pig Iron Quarry is a GW2 jumping puzzle located in Fireheart Rise. This puzzle is straight-forward, though if you fall at certain points you’ll need to start over.
Start off by going to Pig Iron waypoint. Swim across the water to start the jumping puzzle, as seen on the map.
You’ll simply be making your way up as high as possible, then jumping all the way across to the other, larger island. The chest will be there, as well as a veteran. Be careful of his knockbacks and you’ll have your chest in no time.