The house of the merchant Perang sits on top of a tall spire of rock, similar to the homes of most wealthy and powerful people in Tual. The poorer people live in shacks clinging to the base of the spires, resting on wooden posts, where they frequently get flooded or swept away by the stormy seas.
In the Green Sun campaign, Perang turned out to have been replaced by a doppelganger, who died at the hands of the heroes. Tual still exist in Planet Kaendor, and I might use Perang again as an NPC.