On Tuesday, we posted our seventy-third photo challenge to see how well you knew Metro. I took photos of five Metro stations. Here are the answers. How well did you do?

This week we got 35 guesses. Fifteen people got all five. great work!

Image 1: Arlington Cemetery

The first image shows the view down into the mezzanine from the Franconia platform at Arlington Cemetery. This is one of Metro’s few unique stations, so for some of you, the answer probably jumped right off the page.

At Arlington Cemetery, there’s a tunnel under the tracks, with a solitary escalator on either side for each platform. Another clue is the fact that the station has side platforms and a unique roof (the under side of Memorial Avenue).

All 35 knew this one.

Image 2: Farragut North

The second image shows an art installation called “Pulse” at Farragut North. It’s located in the southern entrance escalator shaft, at the northeast corner of Connecticut and K. The artwork is relatively new, installed in early 2013.

Twenty got this one right.

Image 3: Clarendon

The third image shows the plaza above Clarendon station. We featured this plaza in week 27. The plaza is distinctive, and the you may have recognized it or the covered bike parking on either side.

Twenty-four figured it out.

Image 4: Greenbelt

The fourth image, Greenbelt, required you to use more context clues. You can just see the canopy at far right, and should have been able to tell it was a “general peak” roof. You can also tell that it is a station adjacent to railroad tracks. Between those two factors, you could narrow it down to three stations: College Park, Greenbelt, and Rockville.

Because the commuter rail platform at Rockville extends south past the Metro platform it would be visible in this picture if it was Rockville. The station parking lot would also be visible. College Park has a concrete wall between the Metro tracks and the CSX tracks, which is not present here.

Greenbelt fits though. The other clue is the pair of switch motors (the silver colored objects) stradling the CSX tracks. They control the platform sidings which allow trains to access the Greenbelt MARC platforms.

Twenty-seven guessed correctly.

Image 5: Prince George’s Plaza

The final image shows a sign at Prince George’s Plaza. Metro’s Lost and Found Office is located in an office building near the station, and this sign directs riders to the address. You can see part of the message “Lost and Found: 6505 Belcrest Road.”

If you were able to figure out that the sign referred to “lost and found,” you could have googled to figure out where Metro’s lost and found office was, and guessed the sign would be at nearby Prince George’s Plaza.

Twenty-eight came to the correct conclusion.

Information about contest rules, submission guidelines, and a leaderboard is available at http://ggwash.org/whichwmata.

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.