After seeing Tangled I always wanted to build the tower in Minecraft, but never had the time or motivation. So after years of putting it of I finally made it!
I'm still working on a valley to put it in but that's on my test world, so I have to wait for McEdit to update to 1.13 so I can past it into an empty world.
Build includes hidden cave, secret stairway, tower, floating island and a chance of monster. :)