Hi can you tell me what looks like the natural light comiing in the door on the left is if it is a basement?

This was a very informative YT. My question is someone had posted previously an invitation from CPP to a party and asked invited guests to enter from Bucks Fishing and Camping. What is your take as to how they get from Bucks to CPP? I know Little Red Fox is in between the properties. Do you think doors going through each property? Great job on your research and effort!