Shantytown - Exploring the Windmill Building - Part 1

Starting on the MIDDLE LEVEL, where you fought the last group of enemies, go to the north side, where the suspended cages turn and head back the other way. Grab the rifle/SMG ammo and then scramble up the painted wall onto the ledge above.

Here you'll find another alarm (4/4) to destroy for the Silencer challenge. If you've found the others, you'll receive a 150 XP bonus here.

Climb the wooden ladder to the ROOF. Search the pile of debris on the left near the central support to find a GPS cache (10/15).

Then go around to the southwest corner and drop down onto a small ledge to loot the body of the sniper who was shooting at you earlier.

Climb back up the way you came and pick up shotgun shells, arrows and rifle/SMG ammo leaning against the center support.

Move out onto the jutting wooden ledge to the east. From here you can spot 2 more effigies (9 and 10/5). One is below on the right, just above the campsite.

The other is high up on the left. Again, you only need to burn and dismantle 5 of these to complete the challenge, but there are lots of extras in case you miss a few. Of course you can also destroy them out of spite. ;)

Now head for the southeast corner of the roof, where there's a makeshift ladder made of white painted boards. Use it to climb down to the middle level, where you fought the last group of Solarii.