The Lee Valley White water centre is a fully man made whitewater park and in fully I mean it is built from the ground up without using any sort of previously existing waterway.  There is a base pond reservoir for the swimming poolish water from which 13 m3/s volume is made to circulate around by electric powered pumps in a 300m long with 5.5m drop concrete channel full of obstacles to create optimal waves, safe whitewater features mainly to host slalom canoeing events and do rafting, kayaking.  Sounds fun? Well in my experience for a regular nature person and most real river guides, the idea to work in such a place is not so appealing. I spent 10 month working there in 2017 so let me tell you about my insights and maybe widen your perspective on the subject.