There is a river in Thailand that emits fireballs, referred to as Naga’s Fireballs. The phenomenon takes place in the Nong Khai province along the Mekong River and has occurred each year for hundreds of years. On the 11th lunar month, coinciding with the end of the Buddhist Lent, pink, red and orange fireballs jump from the river into the sky for about three days, and the occasion is celebrated with a festival. Legend states that the fireballs are caused by a mythical serpent creature from the river, but scientists believe they could be the result of heated gas being released from decomposed plants and animals on the bottom of the river.
More about the Mekong River: