Boston.com has a story, photos and a video about the East Boston Immigration Station, which saw tens of thousands pass through between 1920 and the mid-1940s. At that point the Marginal Street facility was used to intern people of German and Japanese descent after the United States entered World War II.
Today the structure is decrepit and it's owned by Massport, which is considering tearing it down, though some in the neighborhood are hoping to save and rehabilitate this slice of Eastie's history. One web site is behind the idea. As usual, I expect no attempt by the Evil Empire to consider what local residents think when making a decision that affects our neighborhood.