>>2013510>Holy shit it's a fucking amusement park. Nothing left of the sacredness of nature, it's just used as a money making tool.Maybe you should hit up Wikipedia and read about the history of the area. As soon as we could harness Niagara's power, we did so. The falls are why Buffalo was once a major manufacturing city.
The reason the valley in your pic is relatively untouched is because the location isn't conducive to building factories and waterfalls like that one aren't large or reliable enough to be of any benefit to industry or used for power generation. At Niagara the drop is enough for a good working pressure head and the volume was so high that many industries could take advantage of it.
Here is a more comparable waterfall to Niagara in Switzerland. It had enough land and volume to be useful to industry in the 19th and 20th centuries, and as you can see the area around it was extensively developed. No one gave a shit about protecting rivers back then, even in enlightened Yurop.