In the northeast of Thailand lies the province of Sakon Nakhon where the massive Mekong river winds its way through the land like a giant serpent, Thailand with its flamboyantly coloured temples on one side and Laos with its mysterious cloud-capped mountains of lush jungle jutting out of the land on the other. Some say mystical serpents called Naga live deep within the waters and make their presence felt by shooting balls of fire for the murky depths of the river at the end of Buddhist lent in October – an unexplained natural phenomena commonly referred to as Naga fireballs.