Region in Ferania. A magical forest of the lilliput gnomes. Many legends and even travel diaries refer to a tiny underground gnome city, which only could be accessed by taking a special potion, that shrinks you in size.
Very few, (according to some Trunket testimonies), have had a chance to visit it and return, because not many knew about the potion for de-shrinking you back in size. Leaving all the poor journeymen to live in a tiny city, perhaps forever. And maybe some of them had made that choice on purpose.