The PippinBukkit server is a private (whitelisted) CraftBukkit server.
We are playing on medium difficulty.
All builds are created legitimately in survival! No creative mode, no plug-ins.

Texture pack used: Sphax PureBDCraft 64x (bdcraft.net)

Here's the Nether hub of our server. This large hall was carved just below the bedrock ceiling. Lots of doors going to people's places.
Under the hall, there's a large room that leads down to 3 inverted towers that are "hanging down" from the cave ceiling, aiming their "beams of lava" at the lava sea below.