A small shack sits near a pool of water in the eastern part of the region. Inside the shack you'll find a briefcase on a wooden crate. You can also find an ammo pile here.
Right next to the safehouse in the south-eastern part of the area you can find some train cars. Inside one of them, behind some boards, you can find a briefcase sitting on a crate.
In the far south-western part of the area you can find a large mass of rock (south-west of the Weapons Shop). Behind it, on the western side, you can find an old car with a briefcase sitting on the hood.
A small pool of water can be found in the southern part of the area, north-east of the Weapons Shop. On the eastern side of the pool you can find a briefcase next to a large rock.
North-west of the safehouse by the railroad tracks in the northern part of the region you'll come upon a distinctive flat rock. You can find a briefcase here.
At the water, near the checkpoint in the center of the region, you can find a small makeshift shelter which has a briefcase on the roof. Use the nearby cliff to jump onto the roof.
North-west of the lake you can find a small shelter with a Buggy outside. Beneath the shelter sits some ammunition, health supplies and a diamond briefcase.