Image by JohnnyRokkit via Flickr
The organization, World Monuments Watch, has published online its list of the 100 Most Endangered Sites in the World.
I disagree with some of the US sites, including the Salk Institute in San Diego (I mean, I think the Mission of San Diego is way more important, but, then, I am not an architect.)
You click on the map and drag it to see the sites, then mouse over the white dots.
World Monuments Watch