In the Sedim River Recreation Park, Malaysia:
That rock is nowhere near as high above the water as it looks. I think it was about a metre. The water just at that spot was deep enough that kids were jumping into it from a bridge above, and I didn’t see anyone die. Still, I was chicken! Didn’t the grownups always tell me not to jump into rivers (unless perhaps I was going to enter the Moomba Birdman Rally)? I was worried the current would sweep me into that big rock there. The guys all around encouraged me to jump, until I finally did. And it was fun. I’d already been in the water further down, where it was shallow. It was the first river I’ve ever swum in — really! — and it was the clearest, cleanest water I’ve ever had the pleasure of dunking myself into.
The treetop walk (925m, height up to c. 26m) was pretty impressive, if quite vertiginous in places. The whole walkway is made of metal mesh through which you can look down, and moves a bit when you walk on it. The clotted abundance of the vegetation was quite something to see, though I was a bit disappointed that we didn’t spot any animals apart from a spider and some butterflies — but it was the middle of the day, so perhaps they were all asleep. Anyhow, definitely a place I’d like to go back to.
(Edit: the Sedim treetop walk might have lost its ‘world’s longest’ title to this one in Bavaria. It may still, however, be the world’s longest steel bridge built without machines, as the building materials were carried manually to their location so as not to disturb flora and fauna.)