Farragut West Metro Station

 is a Metro tunnel access point located on the northern outskirts of Washington, D.C., near the river Potomac. It grants access to Farragut West Station.

Location
To the east of Super-Duper Mart and north of Wilhelm's Wharf, across the river from both.

Loot
A door to the right after you go in contains a lot of goodies (including a Protectron that will ask you for a metro pass and attack enemies if you activate the very easy terminal), but the real treasure trove is through some maintenance tunnels. You will eventually come to a locked fence (easy) with ghouls behind it - easy pickings since they can't get to you.

Another locked door (very easy) leads directly up stairs to the Tenleytown/Friendship Station door.

There is a Nikola Tesla and You book in the locked safe (unlockable from the computer) located across from the locked ghoul fence.

Below the ghouls (behind an average locked door) there is a storage room with weapons, three Pre-War Books, missiles, and a U.S. Army: 30 Handy Flamethrower Recipes.