One of the most interesting districts is one that isn't there: the triangular region between the Back Bay and the South End. This was a blank area on the map for every person interviewed, even the one who was born and raised there. It is an area of substantial size containing some known elements such as Huntington Avenue and occasional landmarks such as the Christian Science Church, but the matrix in which these might appear is absent and nameless. Presumably, the blocking by surrounding railroad tracks, and the conceptual squeezing-out of this area because the main streets of Back Bay and the South End are felt to be parallel, both contribute to this disappearance.