Old Olney underground

 is a place added to Fallout 3 with the DLC Broken Steel, accessed via a ladder in Old Olney Sewer.

As part of the quest Shock Value the Lone Wanderer passes this area to reach the Olney Powerworks. It is inhabited by ghouls Kidd and Wint and a lot of Deathclaws. The ghouls (along with several more now-deceased friends) tried to establish a colony here, but disturbed a Deathclaw nest. Kidd and Wint were the only survivors.

Appearances
appears only in the Fallout 3 DLC Broken Steel.