On Tuesday, we posted our seventy-sixth 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 23 guesses. Six got all five. Great work, Gregory Koch, Jay K, Peter K, We Will Crush Peter K, JamesDCane, and AlexC!

Image 1: Glenmont

The first image shows Glenmont. This one was pretty straight-forward. There aren’t very many “Arch II” stations, which have a six coffer cross-section, and the only one on the Red Line is Glenmont.

Nineteen got this one right.

Image 2: Shaw

The next image was taken at Shaw’s southern entrance. The main clue here is the Shaw Library and the lighted art out front. The traffic signals in the background are also clearly DC-style signals, so that may have helped you figure it out.

Seventeen knew this one.

Image 3: Bethesda

The third image shows an entrance pylon at Bethesda station. The sign is clearly non-standard, especially the font, which is not Helvetica. This entrance is on the southeast corner of East-West Highway and Wisconsin Avenue and access to the station is via the office building lobby.

Other than the sign, the biggest clue here is the median, which separates one-way traffic. East-West Highway (Route 410) is a part of a couplet (with Montgomery Avenue) in downtown Bethesda. The five westbound lanes are separated by a median, with the left two lanes turning left onto Wisconsin. This sort of street arrangement is fairly rare.

Fifteen guessed correctly.

Image 4: National Airport

I can almost guarantee that most of you have used this station — National Airport — without ever setting eyes upon this entrance. The station actually has three entrances: The escalator-only entrances at the north and south ends of the platform are staffed and popular. But in between those, there’s a third mezzanine for the elevator-only entrance.

The platform elevators are in the center of the platform, and don’t connect directly to either of the main entrances. Instead, they lead to this small, unstaffed mezzanine with just two faregates and two farecard machines. A covered walkway beneath the platform leads to the main entances and the airport bridges at either end.

As several of you noted, the framing is evocative of the design of the new airport terminal. Another clue is the airport upper level roadway, just visible in the distance. You can also see a column supporting the station at center-right, indicating that this is an elevated station.

Eleven got the right answer.

Image 5: Stadium/Armory

The final image shows a sign outside Stadium/Armory. Like most WMATA stations, only one entrance has an elevator. In this case, that’s the southern entrance. The northern entrance is closest to RFK Stadium and the DC Armory, though, so many users may be unfamiliar with the design. This sign points the way, two blocks farther south to the elevator.

The sign is very reflective of the huge banner in the station that says “Stadium this way,” and I suspect they were designed at the same time. That was a clue. As is the somewhat distinctive fence at left.

Sixteen came to the correct conclusion.

Thanks for playing!

We’re going on hiatus for a few weeks. WhichWMATA will return in 2016. So use the holidays to study up on the Metro system to prepare for more quizzes in the new year.

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.