Venture out to the Mole Hill. You can either walk to the Cache or if you have a 4X4 and a keen sence of adventure feel free to put it through its paces. I just chose to walk this one, and even that can be tricky in some sections.
The Cache container is an Ammo crate and is location just off the track, but as per usual watch out for the spinifex and any reptiles that might be in the area. There is also a prize for the First to Find