I've had dreams in the same location before several nights in a row (not for more than about 5 days). The scenery still changed slightly from night to night, like some tress would get bigger or move around, or there would be a building on the horizon that never used to be there. I don't think your subconscious memory is detailed enough to repaet the same setting exactly from night to night, but it can do pretty well.

Also, if you're fully lucid, you can change your surroundings back to a dream you had before.