This cemetery in Villers-Bretonneux, built by troops from South Australia, contains an empty grave with the following inscription: "The remains of an unknown Australian soldier lay in this grave for 75 years. On November 2, 1993, they were exhumed and now rest in the tomb of the Unknown Soldier at the Australian War Memorial in Canberra".
www.ww1westernfront.gov.au/adelaide-cemetery/maps.html
Wikipedia article:
http://en.wikipedia.org/wiki/Villers-BretonneuxCategory:
cemetery First World War 1914-1918