As Thai and Malaysian authorities continue their hunt for hidden graves of refugees in a remote border jungle, the biggest gravesite of all may have been discovered hidden in plain sight.

Just 800 metres from the front door of the police centre in the Thai border town Padang Besar, and a five-minute stroll from the Thai immigration office, lie dozens of concealed graves of Rohingya refugees who have fled abject persecution in their homeland Myanmar.

More than 100 secret graves might lie in the small cemetery, and overlooking the site just metres away is the house of the smuggler believed to have put them there.