Spellhold

Spellhold is an insane asylum located on the island of Brynnlaw, one of the Nelanther isles, off the western coast of Amn, under the command of the Cowled Wizards of Athkatla. The cursed elven Mage Jon Irenicus was sentenced to imprisonment here for casting illegal arcane magic within the confines of the city. He was too powerful to contain and killed all of the Cowled Wizards who resided there, taking over the facilty to perform his own experiments. There is a portal to the Underdark in a secret room on the main floor of the building. The building itself is connected to a magical dungeon, rarely used to test inmates to see if they are sane enough to leave. Irenicus' vampire sister, Bodhi used the dungeon as a hunting ground to toy with those who made it there.

It features strongly in Baldur's Gate II: Shadows of Amn.