Case No. I · Room 9 of 11
Room 9: Solarium
The final room inside the main house is gorgeous. The walls are all 100% windows, and the ceiling as well. After your stint in darkness in the living room, you feel alive again.
The room is also filled with plants, but unfortunately they have seen better days. I guess no one has been watering them anymore. At least the cacti are still doing well!
As you do a 360 to scan the room, you notice many travelling artefacts hanging on the wall. Next to that is a large world map, with a few pins stuck inside and ropes connecting the pins.

Below that is a pen and paper. Is it connected to the map somehow?

☞ Reveal a clue
Is there a way to refer to airports with three letters?
✎ Found a number? Record it in your Solver's Logbook — you'll need all 11 for the finale.