Tim Gunn would be proud of such an elegant workaround.
Okay so you don't live in a castle. You can at least build a little part of a castle inside for role playing purposes.
Being able to see out your windows isn't nearly as important as restocking the beer fridge in case we get dumped on again.
Imagine the temperature-regulating efficiency of the boulders! I'd definitely sacrifice any space at all for a comfortable air temperature.