AC Valhalla - Infinite Tungsten, Titanium and Iron ore
This video demonstrates a hidden feature/glitch in AC Valhalla where you can collect infinite Tungsten ingot, Titanium and Iron ore from a meteor.
The location may vary but the location in this video is Hamtunshire towards the cliff facing the isle opposite.
You will get 1 Tungsten, ~5 Titanium and ~120 Iron on each meteor.
You do not have to save and reload to trigger another meteor. All you have to do is move away roughly 200 metres and go back to location. You can try to use Synin to re-trigger it but that didn't work for me.