There are many ways to find photos the easiest being the blog SEARCH box:
SEARCH “Peru hiking photos” for example.
Recently Rick has posted more annotated photos & less text. (The photos are worth a thousand words apiece!) And more people have high speed connections with which to view images painlessly.
Flickr – Rick’s Photosets
If you want to use one of Rick’s photos for a non-commercial project, email a request. Normally it is no problem. A photo credit and link is requested.