We haz them.
The hub and the entire network are paved with slabs to prevent mob spawns.
Since the Nether Network is so big now, and most of the useful bits are accessible by horse, players benefit from having a horse in the nether just for getting around.
The horse pen is designed such that a player can jump over the fence, and a horse and its rider can simply walk over the fence, but a horse without a rider can't walk out alone.
There's an enclosure for some mooshrooms, plus a box full of bowls for easy mushroom soup acquisition. The mooshroom pen's floor is grass and flowers, so pigmen can spawn, though this is rare. The fence prevents their escape.
Cassolotl the whimsical admin made a button that does silliness. Push it; it's totally safe but pleasingly aesthetic.
In one corner there is a glass lift shaft. Going up there will take you to the oldhub, and then on to the surface of the nether.
Oldhub: Grass Edition
- Informal junk yard. Following the dismantling of the junk yard at Zero Zero, Cassolotl threw down a few boxes with accompanying signs and item frames for easy navigation. Players dropped off unwanted inventory items and picked up useful bits and pieces on a regular basis. It has been replaced by the new junk yard in setavulos' swamp town.
- AFK room. Because the floor was grass blocks, pigmen and other small nether mobs could spawn freely. There was a 3x3 room protected by glass and a wooden door with a pressure plate inside for speedy escapes. It was paved with slabs to prevent spawns.
- Navigation. Posts and paths made of coloured wool and signs led the way to the coloured arches.