Thaly's chilling in courtyard after carting around parts and pieces. We used them since they can climb the walls and jump roofs. They came in very handy, this thing is huge. Each hallway has glass roof, but it's set up to look like a pergola with open roofing and they all have large tall picture windows to get a good view of the beautiful Ragnarok view and long walkways along them for us (but wide enough for Rex's to walk down them all for transporting them around to all 4).
The roofs are all open and can be used for Argent's, Griffon's, Pterandon's (they can fly in and out of them), Wyvern's can walk along both roofs.