I apologize if this has been discussed recently, but I didn't see any threads on it. My sister and I had a "heated" discusssion last night about what makes the canoes go. She said that there has to be a track of some kind and the canoes have to have some kind of help to get all the way around the river because the guests don't have the strength or experience needed. She also said the river isn't all that deep because it would be too dangerous. I say that there is no way that there is a track and the canoes are most definitely powered by all of us guests that are rowing (with pretty sore arms near the end!) Who's right?