This strange seed had a part of a stronghold that generated above the surface with a village on it. It is one of the strangest structures generation we can ever seen.
When you first spawned in world, you’ll see a plains, birch forest and a mesa biome.
Near spawn, you’ll see a zombie village with a weird stone brick appeared, which is a stronghold.
After you break the stone bricks, it have a library with good enchanted books and more, have fun with the seed!