On top of a tall mountain, an icy tower dominates the landscape. It features 6 bedrooms, a kitchen, storage room, enchanting room, animal farm, and stables, garden, and lounge, as well as the main tower. It also has a control/teleportation room right behind the main tower where you can set the time to night or day or teleport to any room. The two bedrooms on the right side have a beacon running through them, and if you go below the rooms, there's a switch to turn the beacon on/off and a switch to make the beacon rainbow.
This would make a very interesting survival world. Be careful where you place light, because the ice could melt.
There's a lot of glass, so I recommend getting Optifine or Mcpatcher and a texture pack that gives clear connected glass. I use the Clean Glass texture pack. If you have Optifine or Mcpatcher, I also recommend the Custom Sky - Space Edition texture pack, which is how I got the sky to look like it did in the screenshot.