at the start of the stage in Nepal. Specifically Chapter 5, where you get chased by the truck bearing down on you through the alley before shooting it down and it blows up. You emerged on the street, but 3 mercs comes out from the alley looking for you. You hide behind the broken wall, and a school bus comes charging down on the three mercs before crashing beyond in the rubble. Kill the three mercs and climb the stage further up. You will come to the part where the chopper flies overhead, and there's a merc standing guard on a landing. Sneak up, break his neck, then manouver around that level. Instead of walking on the fallen wood plank to the next part of that stage, drop down to street level, using the airconditioning unit as grips. Head down the street, you will come to the part where 2 soldiers run past you , barking orders to the rest to "clear the street". Head right till you reach a manhole with an open lid. Drop down the manhole and you'll find the Strange Relic.

If you play Jak & Daxter games, these relics, from Uncharted 1 and 2, are actually Precursor Orbs. Otherwise, it may just look like an egg with strange symbols on them.