||The key is located in American Gothic, You just have to go by the railroad tracks and it is on the roof of the building connected to the railroadl.
||The key is located in Yucatan Ruins, You have to go to where the flag challenge brought you, and the key is located on top of the fountain in there.
||The key is located in Seaside Links, You have to go straight from where you are, go on the opposite side of the building, and is on the left balcony
||The key is located in Alaskan Tundra, on top of the tower by the airplane hanger, you have to jump over the tower, and you will pick up the key.
||The key is located in Bayou Delta, where the time trial finished, its in the middle of the water, go over the land bridge and follow the thin trail.