I thought that either Kylong Plains or Fens in Kunark would be the largest but what about The Moors? There are like upper, middle, and lower parts of that zone. Others let me know your thoughts please.
Moors of Ykesha is absolutely gigantic. It doesn't matter if you fly directly to the Brokenskull Rock from the UJL or take the airships-- it's going to take you 5 minutes to get there.
There are a lot of huge zones like Moors, but in terms of the largest zone with actual usable space, I'd guess Fens of Nathsar. Moors is mostly pockets of playable terrain spread out over junk terrain geometry and water.
I repeat: hmmm yeah I think Fens and Kylong are both pretty massive in terms of actual explorable space.
I contend that the largest over land zone is Kingdom of Sky because it's the only truly "over land" zone.
Are they over land? Cusa, can you remind me, are the KoS zones floating over Norrath or are they in the Plane of Sky proper? I don't remember if they were still planar or had come over like Shimmering Citadel.
That's something of a muddy area that was never properly explained. We know that the Overrealm is basically the Plane of Sky "leaking" into Norrath's realm because of the cataclysms and gods withdrawing their influence. We've not had any astronomers acknowledge that the Overrealm is up in Norrath's atmosphere, but at the same time we can't see Norrath down below (due to technical limitations and whatnot.) It's obvious from the Drednever Exploration Team that they tried to physically reach the Overrealm through mechanical means, but the NPCs up there don't seem to really talk about the physical location other than "Norrath exists below."