It was funny watching the movie and recognising places I'd been, especially when they were rowing down the great river. The bit where the river turns against a vertical cliff is actually on the Grey River, with the road digitally removed.
Oh the cliff is really there. The road runs along a notch carved into the face of it.
On the way out of the cinema, a lady behind me said loudly "That was a CRAP ending!" a few seconds later she said "There's a book?"