The Meresti trainyard once part of the Washington, D.C. Metro system has since fallen into disuse. This rail yard is due east of Arefu and due west of Agatha's house.
This derelict rail yard is occupied by abandoned passenger and boxcars. The tracks orientate north-south and enter the Metro system through two parallel tunnels on the southern end of the yard. In between the tunnels is a random encounter location.
The tunnels leading to and from the rail yard are booby trapped by the Family. As this service tunnel is only way to reach Meresti station.
Meresti trainyard appears only in Fallout 3.