In WikiSpeak, a crystal palace is a page or set of pages which, having achieved a level of perfection, are no longer active nor living.
CrystalPalace is the name of a location in LondonTown.
There was once a 'palace' there, actually a rebuild of the exhibition hall from the Great Exhibition of 1851, rebuilt on a hill in south London and burned down in 1934.
There is now a large park with an athletics stadium, a railway station and a London suburb. Also a TV tower visible for miles around.
See TheWikiPlateau