Castles in the air are daydreams or fantasies.
Castles in the Air may refer to:
Castles in the Air (1911 film), a Rex Motion Picture Company film Castles in the Air (1919 film), an American film Castles in the Air (1923 film), a British film Castles in the Air (1939 film), an Italian film "Castles in the Air" (song), a 1970 song Castles in the Air (musical), a 1926 musical comedy
See also Castle in the Air (disambiguation)