I caught myself whistling the melody Jerusalem, by Sir Hubert Parry,
as I climbed the stairs of a building nearby. The reverberation in that
stairwell is wonderful. So, I recorded me, whistling the tune
Jerusalem by Sir Hubert Parry, in a stairwell.
Click this word: Jerusalem, to hear the recording and this link, Sir Hubert Parry, for more information about the composer.