Moonlight - Two Differences
This one should be a little easier. It's likely this image takes place in Mediterranean Europe, where it's warm enough to leave the windows open at night. Either way, there are two subtle differences for you to spot here.
Moonlight - Answers
If it wasn't obvious, the moon is missing from the first photo. There is also a mousehole in the second photo that isn't in the first. These shouldn't have been hard to miss.