Elephants perform a reenactment of an ancient battle during the annual Surin Elephant Round-up festival in the northeastern Thai province of Surin on Sunday. /VCG Photo

Over 160 elephants participated in the performances during the festival, which was held on the third weekend in November. /VCG Photo

The event, which is believed to be the world's largest, attracted tens of thousands of visitors from across the world. The northeastern province is well known as the "The Land of Elephants" as it has been presenting the festival for more than 50 years. /VCG Photo

The event has been held to celebrate relationship between elephants and humans since 1962. /VCG Photo