In this map, you can find some biome specific floating islands.
List of floating islands:

• • 2 forest biome (1 bigger, 1 smaller)

• • 1 desert biome

• • 1 mushroom biome

• • 1 dark forest biome

The islands actually have their biome, but outside the islands you will find the void biome.
You can use these anywhere, just don't claim it as your build!
Please also give feedback in comments! :D