Good places to find material?

Material can be found all over the map. But often it's hard to find all three material types in one place, so if you are looking to upgrade weapons, this can be a problem. One place that I like to go to the large cinema near the middle of the map where you can harvest metal from loads of cars, and out side there is a forest for trees and numerous rocks for bricks. There is also an upgrade station and loads of chest loot so it is a handy place to drop into at the start of the game.

Stone Circle