Based on the regions seen here, I think the red forest on the right is the "Queen of Hearts"'s domain:
(Notice the heart shapes in the butterfly's wings.)
There's also these shots from the mushroom forest next door (I think the eyes in the leaves are the same as the "Cheshire Cat" seen in the red forest above):
If we assume the journey is moving counter-clockwise from the "shore" biome where we see Ruby wake up, several shots with Little, and Team RWBY standing above, then the next stop would be the fiery land where Not-Jaune is, and then the foggy place where Yang is in her one-shot, and finally around to the jagged, chained "mountains" where this automaton-like woman is probably from (if you note the chain in her "hair"):
I think that's the likeliest order for the tour of the world set up for us. But then, I have to wonder how the tree figures into it...