On this page of our treasure guide to Uncharted 3 Drake's Deception you can find valuable information about all collectibles available in chapter 13. These are 3 collectibles - Silver Tribal Bangle, Antique Silver Box and Ancient Gold and Coral Bracelet. They can be obtained in between the battles with pirates.
Silver Tribal Bangle
After killing your first opponents, head towards the boat. To the left of the drawbridge, where you will be attacked by a rocket, there is a yellow container . It contains a treasure.
Antique Silver Box
Right at the beginning of the chapter, after defeating all opponents, look around the square made up of floating barges. On the right side of this area, under the watchtower , there is a treasure .
Ancient Gold and Coral Bracelet
At the beginning of the chapter you have to approach a drawbridge, where you will be attacked by a rocket. From this spot, go to the right bank of the ocean . On the next platform, go around the corner to find a treasure .