In chapter 21, how did the waterfall work with the Coriolis effect inside Rama?
Here's the description of the waterfall
So there was the origin of the sound they had heard. Descending from some hidden source in the clouds three or four kilometers away was a waterfall, and for long minutes they stared at it silently, almost unable to believe their eyes. Logic told them that on this spinning world no falling object could move in a straight line, but there was something horribly unnatural about a curving waterfall that curved sideways, to end many kilometers away from the point directly below its source. “If Galileo had been born in this world,” said Mercer finally, “he’d have gone crazy working out the laws of dynamics.”