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It looks to be the back of the Cullen's house - the most we've ever seen is out to the pool (who knew?!) at the end of New Moon or when Rosalie's out on the balcony in Eclipse (which is more to the side) overlooking the forest and river that the Cullen garden backs onto.
In the Breaking Dawn book a lot of vampire battle prep goes on in their yard - including Bella's arm wrestle with Emmett :)
Go vampire Bella!
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