There's a good coffee table book on Ansel Adams and some of the many photos he took in the parks. https://www.amazon.com/Ansel-Adams-National-Parks-Photographs/dp/0316078468
What kind of photo stuff are you into? If you're into photojournalism, you might want to check these out:
A lot of it comes down to doing your own research and finding photographers you like. A few tricks:
Best of luck finding interesting and inspiring material!