Procedural Island Generation

Hello!

I have lately been trying to do 3D procedural generation for terrain. The end goal is to make generating floating islands with blocks (grass, stone, dirt, etc.). I have tried to use some tutorials and Perlin Noise but it doesn't really work for floating islands.

Any help would be appreciated!

 

My current idea is to use perlin noise then isolate the highest points generated and then build islands off those...