The South Korean city of Pyeongchang starts as favourite to win the right to stage the 2018 Winter Olympics but Germany's Munich and Annecy of France still nurture hopes of wresting it from them.
The three bids make their final presentations to more than 100 members of the International Olympic Committee in Durban later tonight.
IOC President Jacques Rogge will announce the winner tomorrow.
Pyeongchang was narrowly beaten by Vancouver of Canada in the contest to stage the 2010 Games and by the Russian Black Sea resort of Sochi for the 2014 Olympics.
