Life Is Strange

This achievement is earned for finding optional photo #2. If missed on the first run, you can "Play Episodes" and select specific parts of the Episode in order to find the missing optional photos through collectibles mode. The following collectible is described and can be seen below:
[0:39] - Optional Photo #2

Once outside, take a picture of the statue.

Collecting all 10 photos will also reward you with the following achievement:

This Achievement is obtained after exiting the main building, you will see a fountain in the middle of the area in front of you, which if you walk up to you can interact with it by sitting down.(Not sure if this is necessary, but it's what I did.) after some dialogue and pressing to stand back up, look towards the statue in the centre of the fountain and press to take the photo, a few seconds later you're achievement will pop.

Can confirm that if you miss it, coming back to get it through 'Collectibles Mode' will still count towards

From the main menu select 'Play Episodes' and then 'Episode 1'.

Find and highlight 'Main Campus' and then 'Play this chapter in collectible mode'.

Follow the video and press (X) to take the photo.