The ride is cheap and you can see many of the temples along the river. The orange flag boat does not announce stops, so make sure to get a map at your hotel and take a picture of the board at the pier so you know when and where to get on/off. It’s super easy to figure out. Each boat has a colored flag, so you know which one to get on. Not every boat goes to every pier, so I just asked my hotel concierge which one to take. We stayed at the Royal Orchid on the river, so the pier was conveniently close by. You pay on the boat for some of the piers, and others you pay before you get on. Warning, the boat does not come to a full/complete stop unless there are a ton of people getting on. It comes and goes quickly, so be ready to get down the ramp and literally hop on. Don’t worry, it’s not as frightening as it sounds but it’s an experience.