Llainfadyn Cottage, Rhostryfan Gwynedd, north-west Wales. Built in 1762.
Built to accommodate quarrymen and made from large mountain boulders with a slate roof. If I’d have seen a built-to-scale model of this before the real thing I’d probably dismiss it as being unrealistic. The boulders look far too large to be incorporated into such a small home. However it does show how readily people can (or are forced to) adapt to their environment.