The library collection and the opera stage are located in Stanstead, but the main entrance and most opera seats are located in Derby Line. Because of this, the Haskell is sometimes called “the only library in the U.S.A. with no books” and “the only opera house in the U.S.A. with no stage”. There is no entrance from Canada, however there is an emergency exit on the Canadian side of the building. All patrons and visitors must use the US entrance to access the building. Patrons from Canada are permitted to enter the US door without needing to report to customs, providing they return to Canada immediately upon leaving the building.