Halo 3 - GOLD SKULL: Iron Skull
Iron Skull
Location: Sierra 117
Towards the close of Sierra 117, you'll be able to find the first of many Gold Skulls. A Pelican will land nearby, but don't board it. Instead, make your way to the left of the Pelican until you are able to jump up onto a ledge which you'll be able to traverse to another ledge that sits against a building. Follow this ledge around the side of the building, and in the furthermost corner where the ledge ends you will find the Iron Skull.
