From the official Anantara Web Sites:
The Story behind the Game
What have started out as a whimsical conversation between two quirky sport lovers, evolved itself to be known as the 6th largest annual event in the Thai tourism calendar. The event in question of being polo with an adventurous twist thus was the birth of polo played on the back of elephants.
The World Elephant Polo Association established the governing rules for Elephant Polo in 1982; the association has its headquarters at the Tiger Tops Jungle Lodge in the Royal Chitwan Park in Nepal, which is where the World Elephant Polo Tournament played every year on a grassy airfield in Megauly. This tournament is played within a relatively small circuit, including the countries Nepal, Sri Lanka and Thailand.
In Thailand, the King’s Cup Elephant Polo Tournament was first launched in Hua Hin by Anantara Resort in 2001. In 2006, the tournament moved to Golden Triangle and was hosted by Anantara Resort Golden Triangle. Elephants are a key symbol of Thailand’s history, and nothing but utmost respect is given to the pachyderms and all proceeds of the tournament are used to ensuring their welfare, sustenance, employment, mahout training and medical treatment provision.
More About Elephant Polo