Ilshenar
Introduced with Third Dawn, Ilshenar was originally only able to be visited with the 3D client. With the Blackthorn's Revenge expansion the 2D client was changed to allow access to Ilshenar.
Ilshenar remains unique in the fact that it is the only facet you can not Recall, Gate Travel, or Sacred Journey into.
Ilshenar has been described as "one big dungeon," because with few exceptions it exists to hunt monsters.
While there are Champion Spawn locations in Ilshenar, Power Scrolls do not drop. There is little reward for doing them there other than Champion Titles (e.g., John Doe, Foe of the Abyss or Jane Doe, Eradicator of the Vermin Horde).
Paragon creatures spawn in Ilshenar, along with the minor artifacts that are rewards for killing paragons.
Cities
Ilshenar is home to the gargoyle city Vel Lor Reg, which translates as "Home of Light."
There is a city of pixies near the Spirituality Shrine, and several ruined cities within which monsters spawn. Lakeshire is one of two homes to the good-aligned Meer race. Within Montor, various demonic and fire-based creatures spawn.