Your search "mekong river" resulted in 2 Articles
Luang Prabang is an idyllic town just north of Vientiane and has been accorded as an UNESCO World Heritage Site since 1995. The fastest way to get to Luang Prabang is to catch a flight from Vientiane domestic airport. Flight time is just under an hour. Another alternative is to travel by coach and it takes about 10-11 hours to get to Luang Prabang from Vientiane.
Vientiane is a good place for see sunset and taste "Beer Lao".