But while rugby union is hugely popular in the British Isles , parts of continental Europe and areas of the southern hemisphere , it remains a mystery to many global sports fans . The 2011 Rugby World Cup will begin on Friday in New Zealand . Hide Caption 1 of 11 Photos:Photos: Held every four years , the tournament will run from September 9 to October 23 .
The 2011 Rugby World Cup will begin on Friday in New Zealand . Hide Caption 1 of 11 Photos:Photos: Held every four years , the tournament will run from September 9 to October 23 .