Chateaux en Espagne
[Castles in Spain.] A castle in the air; something that exists
only in the imagination. In Spain there are no châteaux. (See Castle )
Many wines are named after the manor on which the grapes are grown:
as Château Lafitte, Château La Tour, Château Margaux, Château Rose
(and Bordeaux), Château Yquem
(a white Bordeaux), etc.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894