I made a Hobbit Hole style home. It has 3 levels. The image shows the top.

After digging out the spot and building the ground and second level I then built a solid Hill of Dirt to hide the hole
I chose not to do what I had originally planed which was to make a 3 block high but only fill in to the second block of water.

I plan to build this again in a new server and Maybe place the water onto of that new hobbit hole ^.^
Well if any one wants the plans to the hobbit hole I will share them ^.^