Inside the station, the mezzanine and platform are relatively intact. Subway tunnels are partially destroyed, and access is limited to the tunnel openings, and the subway tracks run north to south. Located off one of the destroyed subway tunnels, there is a service tunnel which leads to a sewer grating ladder. This sewer grating is located south of Bethesda offices west. This station is irradiated by containers of radioactive waste, with the largest concentrations being located on the platform and near the sewer grating ladder.
The underworks are populated by the feral ghouls, and it is not uncommon to see a glowing one or a feral ghoul reaver (if Broken Steel is installed) here amongst the other types of ghouls. Upon entering, the Lone Wanderer may be swarmed by all of the nearby ghouls at once, forcing the them into a fight with around 6 ghouls of varying difficulty.
The feral ghouls and raiders will often start fighting amongst each other if the Lone Wanderer fast-travels to this location.
When entering Bethesda underworks for the first time while wearing the ghoul mask, all the ghouls except one glowing one will run past and exit the underworks. They will go to a specific area in Bethesda ruins and stay there.