This achievement is earned for finding optional photo #7. 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:
] - Optional Photo #7
In the field behind the junkyard, you'll spot a deer. Follow it and take a photo of it.
Collecting all 10 photos will also reward you with the following achievement: