A lot of Woodland Mansions spawn on water. And while it can be cool to have a big house sticking out into a lake, if you want something more realistic, this Mansion that has just a small corner jutting out into a lazy river is for you.
You'll spawn a ways away in a Savanna by another Roofed Forest. On the way to the Mansion, there will be tons of biomes to explore -- including snowy hills, Desert, Birch forest and Roofed Forest. Even better, this seed includes close Villages and Temples, all listed below: