it was about 2002-03 when i saw a movie on sky.
it was about a family that break down in a deserted town in the desert. they find a canyon/reveen full of cars that are stacked in the shape of symbol. also, the mother falls through the floor in to a network of tunnels were she finds boxes of peoples possesions, and then somthing starts to chase her.

if anybody knows the name of this film i would be most greatful if they could tell me.
thanks