Not a Cairn in the World (Bronze) - Knock over all rock cairns in Madagascar
During Chapter 10, you will start out driving a jeep, and are accompanied by both Sam and Sully. Throughout the entire chapter, you will likely stumble upon rock piles, with the very first one being straight ahead as soon as you begin. These are cairns and there's a total of 16 throughout Chapter 10. All you need to do is knock over all 16 cairns in order to get the trophy. Some will likely be stumbled upon while exploring, while a few might remain hidden.
Check out the full guide: http://www.gamerguides.com/uncharted-4-a-thiefs-end/information
Official Site: https://www.gamerguides.com/
iTunes App: https://itunes.apple.com/us/app/gamer-guides/id599410871