This challenge is found in the Cliffside Bunker of Tomb Raider and is very similar to the Non Believer challenge. Again, you simply need to find four banners/flags and burn them using your fire arrows (fire arrows are important as one flag is completely out of reach). Here’s where to find them:
Flag #1: Coordinates – 712558, 3415924
Location. At these coordinates you will find a room with a large WW2 era cannon. The flag is on one of the walls here.
Flag #2: Coordinates – 712566, 3415931
Location. In the main room where you get attacked by a large group, look on the wall above where you enter, and you can find it high up.
Flag #3: Coordinates – 712563, 3415930
Location. This is on the roof of the building where you find the last one. Check the walls.
Flag #4: Coordinates – 712564, 3415928
Location. This one is a bit tricky. Stand on the roof and look at the large metal tower/crane nearby (the one with the thick wires). The flag is high up on one of the beams.