Impressions of Theophrastus Such by George Eliot

Callista is always ready to testify of herself that she is an imaginative person, and sometimes adds in illustration, that if she had taken a walk and seen an old heap of stones on her way, the account she would give on returning would include many pleasing particulars of her own invention, transforming the simple heap into an interesting castellated ruin.

Fraser Island, Queensland

The Lost Treasure of Trevlyn: A Story of the Days of the Gunpowder Plot by Evelyn Everett-Green

Instead of the grim pile of gray masonry that had once adorned the crest of the wooded hill, its narrow loopholes and castellated battlements telling of matters offensive and defensive, a fair and home-like mansion of red brick overlooked the peaceful landscape, adorned with innumerable oriel windows, whose latticed casements shone brilliantly in the southsunlight as it fell upon the handsome frontage of the stately house.

Felbrigg Hall, Norfolk

Life of Lord Byron, Vol. I. by Thomas Moore

At Newstead, both the mansion and the grounds around it were suffered
to fall helplessly into decay; and among the few monuments of either
care or expenditure which their lord left behind, were some masses of
rockwork, on which much cost had been thrown away, and a few
castellated buildings on the banks of the lake and in the woods.

Framlingham Castle, Suffolk