With how contained the valley is either it's flat or the valley is like the plague pit from Defender's Quest or the crater from Krater. I mean like a landmass sized hole.
2 years ago(+1)
this makes a lot more sense to me now! I imagine it functions the same way how Hogwarts hides itself. But inside of just looking invisible or ruins to muggle eyes maybe it hides underground like the myths of agartha? Probably not but it’s some good food for thought!