TonlÃ© Sap is the biggest lake in Southeast Asia and is famous among biologists for its unusual river flow that changes direction twice a year. The rest of us, who don't have the time to sit down on the shore and wait until the water drains out or flows back, will have to settle with the equally unusual life on the lake. Floating villages like Chong Kneas of both Khmer, Cham and ethnic Vietnamese descent are spread out along the edge of the lake and can be visited on a boat trip. Beside the floating homes, there are a school (with basketball court), church, temple... and yes, tourist traps disguised as restaurants and crocodile farms. Don't mind the floating sellers with pet snakes, they are just a part the experience.