After leaving the Dormitory, you're next location will be in the car park, where you will see a RV in the back right corner, walking up to it and interacting with the window will grant you a photo opportunity, take the photo, wait a few seconds and the achievement will pop.
Also be warned that doing this MAY have consequences in a future episode.
Can confirm that if you miss it, coming back to get it through 'Collectibles Mode' will still count towards: