Vang Vieng is a riverside town, located in central Laos about a 4 hour bus ride north of the capital. The main street is full of guest houses, bars, restaurants, internet cafes, tour agencies, and tourists. The area’s main attraction is the dramatic karst hill landscape surrounding Vang Vieng. The limestone mountains are popular with rock climbers while the many unexplored tunnels and caverns are a spelunker’s heaven. Vang Vieng’s most popular activity however is simply floating along the Nam Song river in a inner tube.