Follow the white trail from the airport to the ghost town.
Or follow the black trail...
Right above the ghost town you can find what we at IGN call, Adams Town. This is
where some of the people from DMA (Currently known as Rockstar North) signed
their names on the radar. Dont go too far out there though, your game will
Ghost town East side
Ghost town street overview
Ghost Town East Side
nothing to land on, only solid things are a bar in a dumpster and a few w00den
Adams Town (edge of map)
Nothing here, except 7 names on the radar (one of the first names read by
someone was "Adams Town" and so this is why this place is now named "Adams Town"