The necromancer in charge can be found wandering the halls and conducting experiments in the fort, which is on the shore of a giant underground lake. It is also the site of the tomb of Lord Berich Vlindrel in the official Knights of the Nine plug-in, in which the Hero faces his wraith.
- Underpall Cave
- Underpall Keep
- Underpall Keep Reflecting Chamber
- Underpall Keep - South Wing
- Underpall Keep - North Wing