Mount Vernon Square is both a metro stop and a bathroom

For those who maybe venture into the neighborhood to our north and find yourself at the Mount Vernon Square Metro Station, you may be pleased to hear that metro drivers are using the pocket tracks there as a lavatory!

A "pocket track" is an area of track where a metro train can park and/or reverse directions, and Unsuck DC Metro reports that an Inspector General Report (available here) says that drivers are using the pocket track to relieve themselves.

So that's why Metro smells like that . . .