According to the wiki (http://fallout.wikia.com/wiki/Falls_Church/Mason_Dst_Metro), the area should connect to Falls Church Metro. However, the door that should lead there cannot be activated. I can move through the door and fall through nothing just to be moved to another place in the area.
TTW Version 2.2a
Point Lookout failed to patch. Loaded with ESM only. Never visited.
Load order as detailed in Installation Instructions. Also using Dead Money Junk Rounds Redux mod, TTW_MoreCookingItems, ttw_hellfire_armor_fix_2 and ttw_water_fix.