Thanks for all the advice! I really love all these spots. Ryan how do fares work on the Metro in DC?? How are they with Railfans taking photos from NY Ave?
Fares in DC are distance based, although if you remain within the downtown area it's basically the same fare no matter where you go. One could even walk from WUS to NY Ave, I've done it several times staying in a hotel right next to the NY Ave station. But I'll walk from WUS to the hotel since it's cheaper than riding.
Of course one can't really get into the station without paying, so that is an issue. And you can't enter the Metro at WUS, ride to NY Ave, and then ride back. The system won't know what to do with you, since you started and ended at the same station. So you'd have to exit at NY Ave and then either walk back or reenter paying a second fare to ride back.
Actually, the system will know what to do with you.
If you enter and exit at the same station, you get charged base fare. ($1.60 off-peak, $2.15 during rush hour
*).
*Note: Fares go up July 1.
Anyway, there are several good places to go where you can watch trains from the Metro platform without leaving the faregates.
NoMa-Galluadet U (New York Avenue) [Red Line] This station is good if you like watching trains creep by. You do see a lot of them. It's right next to the lead track into Union Station.
NoMa-Galluadet U platform.
Landover [Orange Line] This station is located right next to the NEC, and at higher elevation. You can watch Acelas speed along the corridor at a good clip (probably about 90), since they don't stop at New Carrollton. Regionals and MARC trains will be slowing for their stop at New Carrollton.
King Street or
Braddock Road [blue/Yellow] These stations are right next to the RF&P Subdivision. You can see the Amtrak trains that operate south of Washington along with VRE trains and CSX freights.
Any station between
Brookland and
Silver Spring [Red] has the platform and Metro tracks between the CSX/MARC tracks. You can see the Capitol Limited, rush hour MARC commuter trains, and freights from the platform.
If you want to venture outside the Metro system, you have options, too.
In Downtown Silver Spring, there's a short segment of elevated trackage for the Metro and CSX tracks. You can get some interesting perspectives.
Outside the Silver Spring station.
College Park [Green] has a pedestrian grade crossing at the MARC station. The tracks are home to CSX and MARC commuter trains.
Commuter rail platforms can also be an option,
Greenbelt,
New Carrollton, and
King Street have easily accessible platforms. Technically, I believe you have to be a ticketed passenger to be on the platform at New Carrollton, but I've never been questioned (I've always been ticketed anyway), despite arriving on the platform more than an hour before my train and taking lots of photos.
New Carrollton.