Byennel is a small city located within eastern Woldlin territory. It served as a crucial military stronghold during the Holy War and the beginnings of Realm War I, though it outlived this purpose as the wood elven front pushed further eastward. This resulted in the city’s military compound being converted into a large prison. An effort was made to consolidate the populations of many of eastern Woldlin’s prisons at the Byennel complex; consequently, POWs and political dissidents found themselves jailed alongside hardened criminals and petty offenders alike hailing from all reaches of the continent.
The city itself is positioned between two of the major rivers that snake through Woldlin territory. These rivers are sometimes referred to as "The Two Roots” in reference to their importance in the transport of goods throughout the kingdom and to the fact that sections of the rivers flow underground -- concealed from the surface in some places for several miles at a time. A small channel was dug through Byennel to connect the two rivers as they never quite intersect naturally, though the wood elves have long denied that the origin of the channel is manmade.