Nanamun River is located about 20 KM away from Kota Belud town, on the way to Kudat. The fireflies river cruise tour usually package together with Proboscis Monkey sighting at Kawa Kawa River. Tourist will usually visit Proboscis Monkey at Kawa Kawa river at 4.3o pm and had their dinner before proceed with fireflies river cruise at Nanamum River after the sun goes down. The tour start at 7pm right after the sun goes down. It is truly amazing moment when we are surrounded by the brightly lit fireflies and when all the fireflies create the “Christmas Tree” effect.