The most beautiful castle.

Inside, I like the black dragon castle – swamp towers, a waterfall, and a library (+500 income). And outside, either the Sorceress castle or the Wizard castle. The Knight castle is too simple, both inside and out. Although I respect the Barbarians, their castle is unappealing, both inside and out. The Necromancer is generally good... I especially like the dragon altar and the Lich Mausoleum (unfinished).