back of beyond

[Y]ou, wi’ some o’ your auld warld stories, that the mind o’ man canna resist, whirl’d them to the back o’ beyont to look at the auld Roman camp—[…]

1816, [Walter Scott], chapter II, in The Antiquary. […], volume I, Edinburgh: […] James Ballantyne and Co. for Archibald Constable and Co.; London: Longman, Hurst, Rees, Orme, and Brown, →OCLC, page 36

It was a regular outside bush township, and though the distance oughtn't to have much to say to people's honesty, you'll mostly find that these far-out back-of-beyond places have got men and women to match 'em.

1882, Rolf Boldrewood, Robbery Under Arms

"I thought I should like to go near the sea — to some quite tiny country place at the back of beyond."

1920, Margaret Pedler, The Hermit of Far End

We began to take Santa Claus to the kids at the isolated sidings for the same reason men all over Australia on the lines back o' beyond did [...] we didn't want them to miss that magic.

1969, Patsy Adam-Smith, Folklore of the Australian Railwaymen, Melbourne: Macmillan, page 151