The Warrens are a network of sewers and underground tunnels primarily beneath Hollywood, previously claimed as domain by the former Nosferatu Primogen, Gary Golden, and his brood. After the Hollywood Nosferatu disappeared in 2006, the Warrens were empty, gradually being encroached upon by animals and the homeless who found their way down there, as well as other, stranger creatures.

The Warrens have recently been cleared out, but remain off limits to those not invited.