I'm having trouble finding an interesting map for my game's act ii finale. I've already used the castle from Curse of Strahd (I think; I bought it separately), but I'd love something similar. Really, I just want an example of a large, furnished, multi-floored complex that's not so big that the party will take three sessions to get through to the showdown. Does anyone know of a suitable map?

There are a ton of maps on pinterest.

Yeah, for that I use my google-fu.  In this case I used "castle map d&d"... and saw some good ones.  Then found Brinewall Castle and it might be something you are interested in.  Has several good maps with the zoomed out a bit perspective and several floors.  But, time spent in Google for maps is usually rewarding.

Google-fu works well. Easily get a ton of castle maps. 

Quote from Grayfax >>

Yeah, for that I use my google-fu.  In this case I used "castle map d&d"... and saw some good ones.  Then found Brinewall Castle and it might be something you are interested in.  Has several good maps with the zoomed out a bit perspective and several floors.  But, time spent in Google for maps is usually rewarding.

 Man, I guess I have much to master. I must have tried something like that, but yours got me something. Thanks

I've used/bought($1 and some are free) maps from https://2minutetabletop.com/ 

Thanks. Patreon is a great map source