Game Version: Pocket Edition
Since their introduction, woodland mansions have been one of the greatest finds you can come across. With rooms filled with loot that more often than not trump even the best temples and blacksmith chests.
Finding woodland mansions are rare enough in general and when it comes to the pocket edition of Minecraft they are quite the rare find indeed. This seed gives you the pleasure of having one of these structures right at the spawn location.
Make sure you wait until you have some weapons to defend yourself before going in to harvest the loot inside.