The Clay Yamantaka Head is the ninety-fifth treasure that can be found in Uncharted 2: Among Thieves.
The Clay Yamantaka Head is found in Chapter 25 - Broken Paradise. After you've obliterated that blue substance hanging on the trees, a staircase will be revealed that heads up to another area. Run along the stairs to the very top, and you'll see a treasure hanging off of the tree roots ahead and on your left. Shoot it down from afar, and then walk up to the location on the ground under the tree roots where you can grab this treasure before proceeding onward.