I see that Wolfgang has pointed to the lyrics for the "loveliest night" -- As I remember there was a thread on that awhile ago, and I think we know the tune in the states as SOBRE LAS OLAS / OVER THE WAVES. There's also Bill Monroe's KENTUCKY WALTZ and a whole bunch of other "state" waltzes that have pretty tunes with varying quality words: ie, Colorado, Montana, Arizona, etc.