The Rhun Ruins are one of the six ruined cities found in Novia that date back to the period in Novian history in which the Obsidian Order rose to power. (As described in the Sword of Midras prequel novel by Tracy Hickman and Richard Garriott). The exact history of some of these cities has been lost to time, but it is rumored that some of them may have been abandoned even before the rise of the Obsidians. Rhun was a city devoted to Compassion but has since been overrun with the undead. It is located in the Drachvald region in the northeast of Novia.
Rhun started as a clone of the Dysborg Ruins, but is getting completely rebuilt this release to have a unique layout and visuals. We are expressly focusing on being sure the map has interesting setups for PVP conflict, with plenty of space for hiding, escaping, ambushing, and skirmishing.
[From a Dev+ Forum Post by Esteben “SorcerousSteve” Zaldivar]
Hey guys! SorcerousSteve here with a sneak peek of the Rhun Ruins! Currently a work in progress, the Rhun Ruins are located on the eastern coast of Drachvald. Once a City of Compassion, its fascination with Obsidian became so high that it brought about its own demise. 
Utilizing our new moving platform tech, we have designed a floating island that circulates the map. The obsidian shards (which are of great concentration in this area of the world) have torn up pieces of earth, as they refuse to be chained down.
As a PVP area, Rhun will have 5 zones dedicated to different play styles. One of those is this maze; its circular design culminating in a central arena. All along the way we will be implementing some of the new traps that have become available to us including spikes, fire traps, and pressure plates.
You can see some of our new traps in action below. So be careful when making a wrong turn or you might walk straight into a spout of fire!
Stay tuned for the next update on the Rhun Ruins.