What are some of the most memorable homes, palaces or architectural settings in books that stuck in your mind?

[Gail]

Part of creating a setting lies in welcoming the reader into the physical environment. What are the houses, castles, and other architectural structures that became real to you?

For me, Rivendell and Hogwarts certainly seemed real enough to touch. Also Callahan's Crosstime Saloon!

[Pauline]

I want to live in Howl's Moving Castle!!! (Either the book or movie version would be fine.)

[Betty]

The layer-cake city of Minas Tirith built into the mountainside in Lord of the Rings. I ditto what Gail said about Hogwarts.