Tony Hawks Project 8

This Achievement can be gotten in the first minute of career game play.
press + to climb off your board, walk around the back of the house, walk up the side of the caravan,jump on to the top of your home roof and look West. The Marker is dead ahead, just on the edge of the roof. A quick 5G's..

also secret spots are represented by floating neversoft symbols. you need to skate/walk into them to get it.