I always wondered where were Endora, Serena, Uncle Arthur, etc... when they were NOT at Samantha's and Darrin's home? Did they have houses of their own? Maybe in Europe or in another geophysical existence? What little we see into the Witches' world, it looks rather bland, they are either just sitting on a cloud or in an empty space. I remember once Endora mentioned finding something, I think a painting, in the back of one of her closets, and once she threatened to move in with Maurice to punish him, so that implies they had some sort of living structures

That warlock Juke appeared to live with mommy on a cloud. And when Samantha went "home" to mother I think they were sitting on a cloud.

And where exactly was the Cosmos Cotillion?