From the sound of the placename, I always located it in Scotland somewhere - not exactly sure as to where.
I love a Seamus Ennis version of the song where the other placenames are around Co. Cavan, Ireland.
From the link Wolfgang gives, there are versions of the song from all of the 'Home Countries' and across the Atlantic, too.
You could open up onto another question as to where's the gate to hell... as they're not far apart in the song :-)
Or you could say to people 'D'ye know the gate to Hell ? - Well, it's 7 days traipse from there...'