UTKC is now in its fifth edition, and is getting bigger than ever. 2000 participants from 32 countries are expected to descend on Koh Chang in Trat province. “Koh” means island. And this means there is a bit of travelling to do. Koh Chang is the third biggest island after Phuket and Koh Samui. And Trat is situated in easternmost Thailand, bordering with Cambodia.