All throughout the game there will be concealed a number of Treasure Chests. Among them is offered as example at the start of the game, where it is positioned in front of a tree. The other boxes will be concealed behind and in between the trees, so it will be more difficult to identify them. I recommend constantly taking notice of the tree clusters and the spaces in between them, in addition to your bottom right side of the screen. Attempt walking in those locations and if you see a hand icon appearing on the bottom right side of the screen, tap on it due to the fact that it indicates that you've discovered a chest!