Sarbreen

Sarbreen, called the City of the Hammer, was a dwarven city built in 616 DR. For a short time in Faerûn's history, it was a great thriving city that shone for a brief moment as the richest of all dwarven holds. Led by master crafters known as Master Masons—armorers, weaponsmiths, jewelers, miners, woodcarvers, glassblowers and others—Sarbreen flourished.

Sarbreen eventually fell to orcs and drow, and its treasures were either carried away or still remained in the ruins of the city, waiting for adventurers to find them. Later, a human city was built on top of the ruins, going by the name of Ravens Bluff. This new city's sewers were built into the ruins of Sarbreen, and the plucky were likely to find either mighty treasures or deadly perils if they went exploring them.