Two examples come to mind. Last year, the USFS extended the lottery permit season in the Enchantments by six weeks due to increasing popularity, no doubt fueled by the incredible pictures of it littered across Instagram. Iceland is a top destination for photographers (for good reason) and I traveled there two months ago, no doubt influenced by the pictures I've seen. But it felt like the country was beginning to get ruined by me and my fellow tourists.
It feels like we're beginning to lose the hidden gems as more and more photographers rush to be the first. But even the non-hidden gems are beginning to get exposed more and more often. But I see the same spots being visited by all photographers and I don't see how they'll handle the continued influx of people:
* Banff NP
* Dolomites
* Iceland
* Lofoten
* Greenland
It's great that people are interested in seeing the world, but I'd say the set of people that love photographing amazing locations and preserving them is much smaller than the set of people that only care about the former. That said, I'm probably more of a contributor to this than I'd care to admit.