10 Properties:  (clockwise from left) 1301 New York Avenue,  N.W ., Washington, DC; 10 and 20 Burlington Mall Road, Burlington, MA; E mbarcadero Center,  San Francisco, CA; 280 Park Avenue, New York, NY;  Riverfront Plaza, Richmond, VA; 500 E  Street,S.W ., Washington, DC; Long Wharf  Marriott ® , Boston, MA