The plane of Limbo inhabits the space between many other planes. Adventurers travelling to the distant past of Shala'jen often find themselves hurtling through Limbo. The Glade of Isolation is nestled in the mists of the plane, as is the bizarre Holding Room. It is upon the plane of Limbo that Lord Twilight, God of Darkness constructed His floating fortress.
Exploring Limbo does not affect your ranking within the Fellowship of Explorers.