Nong Khai's Naga has become the mekong's Loch ness monster.In this sleepy province in the heart of the Isaan. Region 620 kilometers northeast of bangkok,where men are men and bugs are food,just about everyone is happy to regale you with tales of monster sightings or giant,snaking tracks left in the riverbank's mud. Locals know the phenomenon as bung fai paya nak.which have been bubbling up from the mighty river on the late autumn night of the full moon at the end of the buddhist lent for as long as anyone can remember.