Medeval Castle meets Modern Castle. This large castle has been built by me and my team, it boasts a multitude of rooms. I will list some but not all as there are so many and some you can find for yourselves. You will not be disappointed.
Ender Portal Room, Nether Portal Room, Wizards Tower (enchanting), War Planning room with attached Armoury room,
A Grand Library, Throne Room, Ball Room, Blacksmiths with living quarters. Beer and Wine Cellar, Dungeons, Torture room, Staff Living quarters, Working lockable Main Entrance door, A semi automated underground farm, Parkour Tower and some hidden hallways (try walking through paintings) and many many more rooms.
More Pictures and Video to follow
Redstone Work By SirWolfers
You can see this castle and arrange a tour if you visit play.powertrip.net and go to the creative gamemode