> hordes of Chinese tourists (but there are of course simply a lot of Chinese people) take turns in front of a waterfall (on flip flop or even heels), have some pics taken and go back to the bus

In the early 90s in my region in southern europe we'd joke that the only Chinese tourists you'd see would be referred to as "5min for photo". They always only needed 5mins to get out with camera, snap pics, get back in. This is not a new phenomenon.