River Tubing in Vang Vieng (Laos)
For a few dollars they give everyone a tube like that and you drift down a warm river, stopping at bars every few hundred yards for about 4 kilometers (2.5 miles), upstream from the village of Vang Vieng. It takes several hours, depending on how how much you drink in each bar. The biggest attraction in the bars are giant swings, very high above the river water. Most people risk their lives jumping from those and it's quite a show. There are injuries and deaths every year, but it is really quite fun to jump from 5 to 8 meters (15 to 24 feet) high into the river water.
Photos taken in Laos