The Warrens are tunnels underneath Dock Ward and Castle Ward in Waterdeep. The Warrens have existed for hundreds of years and are inhabited primarily by gnomes and halflings. The existence of the tunnels was unknown to most Waterdavians until the gnomes told the halfings about the tunnels and the halflings told everyone else.
There is a temple dedicated to Baravar Cloakshadow located within the Warrens. The elder high priest of the temple, as of 1479 DR, was Ompahr Daergech. His great-great-great-granddaughter, Roywyn Daergech was also a priest at the temple.