On each association website, search for your topic by keyword, or look at its Publications or Resources section.
The UNESCO International Council on Monuments and Sites Documentation Centre is the primary repository for the original documentation of the cultural properties that have been inscribed on the UNESCO World Heritage List. See all property descriptions here.
Anthropology has many museums, institutes, collections, government agencies, and scientific associations, all of which serve as rich sources of information. I have highlighted some of these on this page.
View the exhibitions and collections at these museum and library websites.