Seed ID: 133102
This is probably one of the biggest mushroom biomes I have ever seen and probably one of the best of them as well. It has everything. All different possible types of mushrooms and lets not forget the awesome floating little island. This is pretty much The Mushroom Biome. Also, if you start traveling outside the mushroom biome you will find an other floating island in a farmland landscape. Coords are given for both places down below.