Woodsman said:David Francey and this song always finds me in a thinkin' mood.
https://www.youtube.com/watch?v=MG8tPN93O44
One of the things I particularly like about the David Francey track above, is the way the song is recorded using only the human voice, without any backing musical instrumentation. The song starts with him singing alone, but each verse adds a new harmony voice, so that at the end it becomes kind of a choral piece.
It reminds me of a very beautiful song by Sinead O'Connor called "In this Heart", which uses a similar production technique.
Another good example is by a Canadian music trio called The Wailin' Jennys and their take on the traditional Irish folk ballad called "The Parting Glass".