Kuang Si Falls are the waterfalls in Luang Prabang. I talked this Irish guy, David into cycling on cruiser bikes 35 kms each way to get there. He wasn't happy for most of the ride, but his back wheel was crooked, so he had a tougher time than me. We "raced" these other 2 american girls who were on mountain bikes (with gears) and we won. I don't know if they knew it was a race or not.