This view from the castle’s front steps (normally off-limits to visitors, since it is the Parsons’ front porch, after all) shows something interesting when viewed in full file mode:  the strange stone faces of the Theatro Verde are perfectly framed by a break in the woods in the distance, perfectly aligned with the castle’s front door.  Unless seen from this vantage point, their placement in a far corner of the Demesne seems very strange.  They are still strange, true, but their placement isn’t.
The Leviathan's supporting walls are at the left.