Search intensifies for Tom Phillips & three children

[nzoomed]

Good point about the caves, makes a ton of sense too as i was wondering with all the infra red cameras and drones, etc it should be a piece of cake to find people in the bush.
And with this cave system, there are many caves yet to be discovered, some on private land too.
Its obvious that should they be holing out in a cave, that its either an unexplored cave or one that gets little to no exploration.
Perhaps if its private land, the cave might be owned by someone who is helping him out.