• Cloud Club in Another Day, Another Dungeon by Costikyan, Greg
  • Bespin's Cloud City in Star Wars series
  • Morrolan's castle "Castle Black" in Steven Brust's books about Vlad Taltos

Table of contents
1 Not-Quite
2 Music
3 Related

Not-Quite

  • Mt. Olympus, home of the Greek Gods. It is a palace that is high above the clouds, so it is sort of a floating castle, but reference is made to "the topmost peak of many-ridged Olympus", so it's not exactly a floating castle. Also, Zeus claims that he hand the earth and sea from a pinnacle of Olympus, so it's not exactly clear what it is.
  • Cloudcuckooland from Aristophanes' The Birds

Music

Castles in the Sky by Ian Van Dahl

Related