Everyone has this question. I THOUGHT they were in trees at first. Silly me. NOpe, underground.
caves, or swimming in water, or something like that. I put c4 on those doors, and then shoot the c4 and blow it up. of course, you dont know that at first either. you just shoot it a few times with your regular gun, nothing happens so you walk away.
There are no many tricks, but these are a few of them. good luck with you relic hunt.
Thank you for sharing.
Dr. Darrell of Michigan. 13.1 mile (21 KM ) half marathon on May 5th. Finished 3:24 Minutes