After the opening scene, follow Meenu down the stairs to your right, and you will find the first Photo Opportunity spot at the stall in front of you.
Snap a picture before turning around and heading toward the building off to the right.
Treasure #1: Ganesh Figurine
This one is impossible to miss. Chloe will automatically try to take it back from Meenu as you travel through the marketplace.
Moving forward, you can try to enter the temple for a bit of extra dialogue. Otherwise, go on down the stairs and there will be another prompt you can trigger by the handbag stall.
Proceed further along then take a left toward the bridge for the next scene, then hop on the back of the truck while Meenu distracts the soldier. That should do it for the opening chapter.