Teams now fly to the city of Punta Arenas, Chile. Once they find the shipwreck, they will discover their next clue. In this Detour, teams can choose between Navigate it, in which they must use a map of Punta Arenas to ultimately find the Nautilus building, and Sign It, in which they must use a map of Magellan's voyage to build a traditional local sign post. Problems early on may tarnish Rob and Amber's pristine record. After completion, contestants fly to Ushuaia, Argentina where a Roadblock is waiting for them. In this task, each chosen member must look through numerous envelopes and find a letter addressed to their team. Once the letter is read completely, they receive their final destination.