Visit Us

  • Visit Us at our Offices in Washington DC and Philadelphia

Our office is your office too! Come visit us at our headquarters in Washington, D.C., or at our office in Philadelphia.


901 D Street SW
Suite 1050
Washington, DC 20024

(Located across the street from the L'Enfant Plaza mall and metro at 9th and D Streets SW)


Take the Blue, Orange, Silver, Green, or Yellow line (any WMATA metro line except Red) to L'Enfant Plaza station. Proceed to the L’Enfant Plaza Mall Concourse, 9th and D Streets exit up the escalator to enter the L’Enfant Plaza shopping and dining area. Exit the building and walk across D Street to 901 D Street SW.*  
*If you exit at 7th Street and Maryland Ave/D Street, head south on 7th Street (away from Independence Ave/National Mall and Smithsonian Museums) and make a right on D Street until you reach 901 D Street SW.  

We recommend using "Smithsonian Science Education Center” located in the 901 D Street SW building as your pickup and/or dropoff location. Our building has an additional building entrance that faces onto L'Enfant Plaza SW (370 L’Enfant Plaza SW) which can cause confusion for some rideshare apps. 


Several public parking garages are located within a block of the OFN office building. Be sure to have your credit or debit card, as cash may not be accepted at all garages.


123 South Broad Street
Suite 1930
Philadelphia, PA 19109

(Located across the street from the Union League)

Subway & Trolley

Take the SEPTA Market-Frankford Line or Trolley to 15 Street or 13 Street stations. Or take the Broad Street Line to Walnut-Locust station. Walk to 123 South Broad Street. 


Take a SEPTA Regional Rail train to Suburban Station. Walk to 123 South Broad Street. 


Public parking is available within a block of the OFN office at 1305 Walnut Street. Garage entrances are located on both Walnut and Sansom Streets.