Chateau en Espagne

a castle in Spain, that is, a castle in the air, Spain being the region of romance.

See also: Chateaubriand

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in classic literature ?
The prize-story experience had seemed to open a way which might, after long traveling and much uphill work, lead to this delightful chateau en Espagne. But the novel disaster quenched her courage for a time, for public opinion is a giant which has frightened stouter-hearted Jacks on bigger beanstalks than hers.
His first appearance was by a collection of stories in a long series of volumes entitled "Contes deux fois racontees." The titles of some of his more recent works (we quote from memory) are as follows: "Le Voyage Celeste a Chemin de Fer," 3 tom., 1838; "Le nouveau Pere Adam et la nouvelle Mere Eve," 2 tom., 1839; "Roderic; ou le Serpent a l'estomac," 2 tom., 1840; "Le Culte du Feu," a folio volume of ponderous research into the religion and ritual of the old Persian Ghebers, published in 1841; "La Soiree du Chateau en Espagne," 1 tom., 8vo, 1842; and "L'Artiste du Beau; ou le Papillon Mecanique," 5 tom., 4to, 1843.
Le Grand Casablanca qu'imagine Khalid Safir en 2020 n'est pas un chateau en Espagne. Il faut bien se donner [beaucoup moins que]les moyens de realiser ses reves[beaucoup plus grand que].