This is not a well-considered idea because a treasure chest from Amazon is most likely a novelty item rather than a waterproof container, and there are far better ways of preserving copies of pictures (such as scanning them for digital backup or giving paper copies to a friend or family member who lives elsewhere) rather than burying them. In addition, you've asked this same question on two other subreddits. Lastly, you made a post yesterday on another subreddit predicting a nationwide power outage in the United States today, so it seems likely that your posts are trolling.