On Monday, we posted our twenty-seventh photo challenge to see how well you know Metro. I took five photos in Metro. Here are the answers. How well did you do?

This week, we got 24 guesses. Seven of you got all five correct. Great work, thesixteenwords, Justin…, Aaron, MZEBE, Ken C, Mr Johnson, and Peter K!

Image 1: Union Station

The first image shows the never-finished H Street entrance at Union Station. Behind the wall (partially hidden by the advertisements) is an unfinished tunnel that runs almost all the way to H Street. One day, it may connect Red Line riders to the H Street streetcar or the proposed Metro loop line under H Street. Seventeen of you got this one right.

Image 2: Rockville

The second picture shows the canopy at Rockville and the MARC/Amtrak station next door. Everyone who guessed this week guessed a station that had a commuter rail connection (except one person who guessed Shady Grove), but the commuter rail station at Rockville is distinctive because of its canopy, side platforms, and lack of overhead wires. Fifteen of you guessed correctly.

Image 3: Clarendon

This picture shows the plaza along Wilson Boulevard outside Clarendon station. It’s distinctive because of the covered bike parking and the nearby buildings. Fourteen of you knew this one.

Image 4: Franconia-Springfield

The fourth image shows Franconia-Springfield. This one was a little harder, since there’s less context. However, the roof type is clearly “High Peak,” which narrows it down to four stations. The sign in the distance references “commuter rail,” further narrowing this to Franconia. Twelve of you got this one right.

Image 5: Twinbrook

The final image was quite challenging, but despite that, ten of you knew it. This shows the mezzanine at Twinbrook. There were two clues to help you on this one. First, you can see the whole mezzanine (since you can see the faregates), and the only entrance has one escalator and a staircase. Secondly, since the stairs go up, this has to be a station with a mezzanine below the platform.

Only Twinbrook fits the bill. Other stations have staircases, certainly. But they’re in different configurations. Other common guesses included Brookland and East Falls Church, but those stations have side-by-side escalators, not a staircase. In fact, the escalator pictured here is the only escalator at Twinbrook. This station has only one escalator, the fewest number of any station (except Forest Glen, which has none).

Next Monday we’ll have five more photos for you to identify. Thanks for playing!

Matt Johnson has lived in the Washington area since 2007. He has a Master’s in Planning from the University of Maryland and a BS in Public Policy from Georgia Tech. He lives in Dupont Circle. He’s a member of the American Institute of Certified Planners, and is an employee of the Montgomery County Department of Transportation. His views are his own and do not represent those of his employer.