You ride on: a tube
Crazy river
A big fast river with rapids and pools where lots of people ride at the same time.A wide, fast flume with buffer pools where many tubers ride at once. The Falls at Schlitterbahn New Braunfels (2011) runs about 0.7 miles and is billed as the world's longest tubing river.
📖Tell me more
The Falls at Schlitterbahn in Texas is over a kilometre long, the longest tubing river in the world.