This is Elliots current set up, however, he just turned three and needs a makeover. After looking at Gpaint's Maleficent the Movie Theme - "The Moors" enclosure, I want to attempt to do a piece of a movie landscape.
Some ideas I have had were pride rock (Lion King) and Island of Berk (How to train your dragon).
I'm not sure if you are planning a new build or just new decor... But my suggestion is always to make it as big as you have room for, and try to keep the space and furniture as useful for the lizard as possible.
how about Malham Cove (it is a natural rock formation in yorkshire with a lime stone pavement) - it appeared in one of the harry potter films and there are plenty of views on google