While in the Panoz GTR-1, go to the winding red road that has flowers around it; on the map in the lower right hand corner, it will look like a winding green road. Go up the path and go down the other side, all the way to the tunnel in the grass. Turn around and drive up the steep incline. Note: You can go off the jump at an angle to land inside a group of buildings. You cannot get out from inside.