The Bronze Stupa Ornament is the sixtieth treasure that can be found in Uncharted 2: Among Thieves.
The Bronze Stupa Ornament is found in Chapter 17 - Mountaneering. Before you shoot the crate down to continue, you'll want to grab another treasure. The crate and the way forward is to your right, but instead, go leftward, passing the corpse with the ammunition near it. You can squeeze through a thin passageway and reach an isolated cavern within the mountain. Simply jump across the gap to the only other platform here, and the on-screen treasure prompt should show up. This is an easy treasure to get in premise, but it's also an easy location to miss all together.