Which phenomenon said to be often seen on the Mekong River is  Mekhong Full Moon Party about
Mekhong Full Moon Party Mekhong Full Moon Party (Thai: 15 ค่ำ เดือน 11 ; rtgs: Sip Ha Kham Duean Sip Et ; literally, "The 15th Day of the 11th Month") is a 2002 Thai comedy-drama about the Naga fireballs that arise from the Mekong at Nong Khai on the full moon in October. Written by Jira Maligool, the film was also Jira's directorial debut.
Cả River The Cả River (Laotian: Nam Khan, Vietnamese: Sông Cả or better known as sông Lam or Lam River wikt:蓝) is a river in mainland Southeast Asia. It originates in the Loi Mountains of Laos, crossing Lao PDR's Xiangkhouang Province, Vietnam's Nghệ An and Hà Tĩnh provinces and empties into the Gulf of Tonkin, on the North Central Coast of Vietnam, after a 512 km journey. The Cả River zone is classified as 300 km by the Vietnam Geographical Survey. The Bến Thủy bridge, crossing into Bến Thủy, Vinh, crosses the Cả River on its Cửa Hội estuary.